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28460800 = 28524447
BaseRepresentation
bin110110010010…
…0011100000000
31222112221212201
41230210130000
524241221200
62454002544
7463625044
oct154443400
958487781
1028460800
111507a025
129646454
135b86514
143acc024
152772c6a
hex1b24700

28460800 has 54 divisors (see below), whose sum is σ = 70460768. Its totient is φ = 11381760.

The previous prime is 28460779. The next prime is 28460801. The reversal of 28460800 is 806482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28460801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4177 + ... + 8623.

Almost surely, 228460800 is an apocalyptic number.

28460800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28460800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35230384).

28460800 is an abundant number, since it is smaller than the sum of its proper divisors (41999968).

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

28460800 is an equidigital number, since it uses as much as digits as its factorization.

28460800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473 (or 4454 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28460800 is about 5334.8664463133. The cubic root of 28460800 is about 305.3156277540.

The spelling of 28460800 in words is "twenty-eight million, four hundred sixty thousand, eight hundred".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 128 160 200 256 320 400 640 800 1280 1600 3200 4447 6400 8894 17788 22235 35576 44470 71152 88940 111175 142304 177880 222350 284608 355760 444700 569216 711520 889400 1138432 1423040 1778800 2846080 3557600 5692160 7115200 14230400 28460800