28689508 has 12 divisors (see below), whose sum is σ = 51826432. Its totient is φ = 13881960.

The previous prime is 28689499. The next prime is 28689527. The reversal of 28689508 is 80598682.

It is a happy 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, 115560 + ... + 115807.

Almost surely, 2^28689508 is an apocalyptic number.

It is an amenable number.

28689508 is a deficient number, since it is larger than the sum of its proper divisors (23136924).

28689508 is a wasteful number, since it uses less digits than its factorization.

28689508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231402 (or 231400 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 28689508 is about 5356.2587689543. The cubic root of 28689508 is about 306.1312749290.

The spelling of 28689508 in words is "twenty-eight million, six hundred eighty-nine thousand, five hundred eight".