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12801408 = 273173753
BaseRepresentation
bin110000110101…
…010110000000
3220002101020020
4300311112000
511234121113
61134213440
7213544614
oct60652600
926071206
1012801408
117253984
124354280
1328629c9
1419b3344
1511cd023
hexc35580

12801408 has 128 divisors (see below), whose sum is σ = 37674720. Its totient is φ = 3833856.

The previous prime is 12801377. The next prime is 12801413. The reversal of 12801408 is 80410821.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

12801408 is a modest number, since divided by 1408 gives 1280 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241510 + ... + 241562.

Almost surely, 212801408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12801408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18837360).

12801408 is an abundant number, since it is smaller than the sum of its proper divisors (24873312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12801408 is a wasteful number, since it uses less digits than its factorization.

12801408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 12801408 is about 3577.9055325707. The cubic root of 12801408 is about 233.9299958613.

The spelling of 12801408 in words is "twelve million, eight hundred one thousand, four hundred eight".

Divisors: 1 2 3 4 6 8 12 16 17 24 32 34 37 48 51 53 64 68 74 96 102 106 111 128 136 148 159 192 204 212 222 272 296 318 384 408 424 444 544 592 629 636 816 848 888 901 1088 1184 1258 1272 1632 1696 1776 1802 1887 1961 2176 2368 2516 2544 2703 3264 3392 3552 3604 3774 3922 4736 5032 5088 5406 5883 6528 6784 7104 7208 7548 7844 10064 10176 10812 11766 14208 14416 15096 15688 20128 20352 21624 23532 28832 30192 31376 33337 40256 43248 47064 57664 60384 62752 66674 80512 86496 94128 100011 115328 120768 125504 133348 172992 188256 200022 241536 251008 266696 345984 376512 400044 533392 753024 800088 1066784 1600176 2133568 3200352 4267136 6400704 12801408