28642588 has 24 divisors (see below), whose sum is σ = 55442912. Its totient is φ = 12861504.

The previous prime is 28642583. The next prime is 28642591. The reversal of 28642588 is 88524682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28642583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5520 + ... + 9367.

Almost surely, 2^28642588 is an apocalyptic number.

It is an amenable number.

28642588 is a deficient number, since it is larger than the sum of its proper divisors (26800324).

28642588 is a wasteful number, since it uses less digits than its factorization.

28642588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14941 (or 14939 counting only the distinct ones).

The product of its digits is 245760, while the sum is 43.

The square root of 28642588 is about 5351.8770538943. The cubic root of 28642588 is about 305.9642973140.

The spelling of 28642588 in words is "twenty-eight million, six hundred forty-two thousand, five hundred eighty-eight".