28662988 has 12 divisors (see below), whose sum is σ = 50424192. Its totient is φ = 14256080.

The previous prime is 28662973. The next prime is 28662989. The reversal of 28662988 is 88926682.

It is not an unprimeable number, because it can be changed into a prime (28662989) 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, 17995 + ... + 19522.

It is an arithmetic number, because the mean of its divisors is an integer number (4202016).

Almost surely, 2^28662988 is an apocalyptic number.

It is an amenable number.

28662988 is a deficient number, since it is larger than the sum of its proper divisors (21761204).

28662988 is a wasteful number, since it uses less digits than its factorization.

28662988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37712 (or 37710 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The square root of 28662988 is about 5353.7825880400. The cubic root of 28662988 is about 306.0369186663.

The spelling of 28662988 in words is "twenty-eight million, six hundred sixty-two thousand, nine hundred eighty-eight".