28626188 has 12 divisors (see below), whose sum is σ = 50134560. Its totient is φ = 14302032.

The previous prime is 28626163. The next prime is 28626193. The reversal of 28626188 is 88162682.

It is a super-2 number, since 2×28626188² = 1638917278822688, which contains 22 as substring.

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, 6518 + ... + 9986.

It is an arithmetic number, because the mean of its divisors is an integer number (4177880).

Almost surely, 2^28626188 is an apocalyptic number.

It is an amenable number.

28626188 is a deficient number, since it is larger than the sum of its proper divisors (21508372).

28626188 is a wasteful number, since it uses less digits than its factorization.

28626188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536 (or 5534 counting only the distinct ones).

The product of its digits is 73728, while the sum is 41.

The square root of 28626188 is about 5350.3446617952. The cubic root of 28626188 is about 305.9058904355.

The spelling of 28626188 in words is "twenty-eight million, six hundred twenty-six thousand, one hundred eighty-eight".