28907516400 has 120 divisors (see below), whose sum is σ = 105829071744. Its totient is φ = 6607430400.

The previous prime is 28907516369. The next prime is 28907516413. The reversal of 28907516400 is 461570982.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-4 number, since 4×28907516400⁴ (a number of 43 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1712286 + ... + 1729085.

Almost surely, 2^28907516400 is an apocalyptic number.

28907516400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28907516400 is an abundant number, since it is smaller than the sum of its proper divisors (76921555344).

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

28907516400 is a wasteful number, since it uses less digits than its factorization.

28907516400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441399 (or 3441388 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 28907516400 in words is "twenty-eight billion, nine hundred seven million, five hundred sixteen thousand, four hundred".