28925638146 has 12 divisors (see below), whose sum is σ = 62672216022. Its totient is φ = 9641879376.

The previous prime is 28925638117. The next prime is 28925638151. The reversal of 28925638146 is 64183652982.

28925638146 is a `hidden beast` number, since 2 + 8 + 9 + 256 + 381 + 4 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19339074225 + 9586563921 = 139065^2 + 97911^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28925638092 and 28925638101.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 803489931 + ... + 803489966.

Almost surely, 2^28925638146 is an apocalyptic number.

28925638146 is an abundant number, since it is smaller than the sum of its proper divisors (33746577876).

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

28925638146 is a wasteful number, since it uses less digits than its factorization.

28925638146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606979905 (or 1606979902 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 28925638146 in words is "twenty-eight billion, nine hundred twenty-five million, six hundred thirty-eight thousand, one hundred forty-six".