28556004904560 has 320 divisors, whose sum is σ = 112634450933760. Its totient is φ = 6514108784640.

The previous prime is 28556004904547. The next prime is 28556004904589. The reversal of 28556004904560 is 6540940065582.

28556004904560 is a `hidden beast` number, since 2 + 8 + 5 + 56 + 0 + 0 + 490 + 45 + 60 = 666.

It is a super-2 number, since 2×28556004904560² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 28556004904497 and 28556004904506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5728000 + ... + 9482720.

It is an arithmetic number, because the mean of its divisors is an integer number (351982659168).

Almost surely, 2^{28556004904560} is an apocalyptic number.

28556004904560 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 28556004904560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56317225466880).

28556004904560 is an abundant number, since it is smaller than the sum of its proper divisors (84078446029200).

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

28556004904560 is a wasteful number, since it uses less digits than its factorization.

28556004904560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755253 (or 3755241 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 54.

The spelling of 28556004904560 in words is "twenty-eight trillion, five hundred fifty-six billion, four million, nine hundred four thousand, five hundred sixty".