28525688 has 16 divisors (see below), whose sum is σ = 56301000. Its totient is φ = 13512096.

The previous prime is 28525687. The next prime is 28525691. The reversal of 28525688 is 88652582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28525687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93683 + ... + 93986.

Almost surely, 2^28525688 is an apocalyptic number.

It is an amenable number.

28525688 is a deficient number, since it is larger than the sum of its proper divisors (27775312).

28525688 is a wasteful number, since it uses less digits than its factorization.

28525688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187694 (or 187690 counting only the distinct ones).

The product of its digits is 307200, while the sum is 44.

The square root of 28525688 is about 5340.9444857628. The cubic root of 28525688 is about 305.5474821350.

The spelling of 28525688 in words is "twenty-eight million, five hundred twenty-five thousand, six hundred eighty-eight".