28185457804 has 12 divisors (see below), whose sum is σ = 56370915664. Its totient is φ = 12079481904.

The previous prime is 28185457789. The next prime is 28185457829. The reversal of 28185457804 is 40875458182.

28185457804 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503311719 + ... + 503311774.

Almost surely, 2^28185457804 is an apocalyptic number.

It is an amenable number.

28185457804 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28185457804 is a wasteful number, since it uses less digits than its factorization.

28185457804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006623504 (or 1006623502 counting only the distinct ones).

The product of its (nonzero) digits is 2867200, while the sum is 52.

The spelling of 28185457804 in words is "twenty-eight billion, one hundred eighty-five million, four hundred fifty-seven thousand, eight hundred four".