28860988 has 24 divisors (see below), whose sum is σ = 55144208. Its totient is φ = 13136256.

The previous prime is 28860983. The next prime is 28860989. The reversal of 28860988 is 88906882.

It is a super-2 number, since 2×28860988² = 1665913256672288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28860983) 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, 6 + ... + 7597.

Almost surely, 2^28860988 is an apocalyptic number.

It is an amenable number.

28860988 is a deficient number, since it is larger than the sum of its proper divisors (26283220).

28860988 is a wasteful number, since it uses less digits than its factorization.

28860988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693 (or 7691 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 28860988 is about 5372.2423623660. The cubic root of 28860988 is about 306.7399892938.

The spelling of 28860988 in words is "twenty-eight million, eight hundred sixty thousand, nine hundred eighty-eight".