28785600408 has 32 divisors (see below), whose sum is σ = 73321815600. Its totient is φ = 9414158208.

The previous prime is 28785600407. The next prime is 28785600443. The reversal of 28785600408 is 80400658782.

It is a super-2 number, since 2×28785600408² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28785600407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11313823 + ... + 11316366.

Almost surely, 2^28785600408 is an apocalyptic number.

It is an amenable number.

28785600408 is an abundant number, since it is smaller than the sum of its proper divisors (44536215192).

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

28785600408 is a wasteful number, since it uses less digits than its factorization.

28785600408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22630251 (or 22630247 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 28785600408 in words is "twenty-eight billion, seven hundred eighty-five million, six hundred thousand, four hundred eight".