28057728184 has 32 divisors (see below), whose sum is σ = 55914768000. Its totient is φ = 13161461472.

The previous prime is 28057728173. The next prime is 28057728187. The reversal of 28057728184 is 48182775082.

It is a super-2 number, since 2×28057728184² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) 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 (28057728187) 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, 880414 + ... + 911725.

It is an arithmetic number, because the mean of its divisors is an integer number (1747336500).

Almost surely, 2^28057728184 is an apocalyptic number.

It is an amenable number.

28057728184 is a deficient number, since it is larger than the sum of its proper divisors (27857039816).

28057728184 is a wasteful number, since it uses less digits than its factorization.

28057728184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792267 (or 1792263 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 52.

The spelling of 28057728184 in words is "twenty-eight billion, fifty-seven million, seven hundred twenty-eight thousand, one hundred eighty-four".