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68669184 = 28389413
BaseRepresentation
bin1000001011111…
…00111100000000
311210012202102010
410011330330000
5120034403214
610451452520
71462451463
oct405747400
9153182363
1068669184
11358421a1
121abb7140
13112c3b6c
1491972da
156066659
hex417cf00

68669184 has 36 divisors (see below), whose sum is σ = 182762216. Its totient is φ = 22889472.

The previous prime is 68669179. The next prime is 68669201. The reversal of 68669184 is 48196686.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43939 + ... + 45474.

Almost surely, 268669184 is an apocalyptic number.

68669184 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

68669184 is an abundant number, since it is smaller than the sum of its proper divisors (114093032).

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

68669184 is an equidigital number, since it uses as much as digits as its factorization.

68669184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89432 (or 89418 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 68669184 is about 8286.6871547078. The cubic root of 68669184 is about 409.5000529250.

The spelling of 68669184 in words is "sixty-eight million, six hundred sixty-nine thousand, one hundred eighty-four".

Divisors: 1 2 3 4 6 8 12 16 24 32 48 64 96 128 192 256 384 768 89413 178826 268239 357652 536478 715304 1072956 1430608 2145912 2861216 4291824 5722432 8583648 11444864 17167296 22889728 34334592 68669184