28838979 has 24 divisors (see below), whose sum is σ = 47225360. Its totient is φ = 16811712.

The previous prime is 28838977. The next prime is 28838981. The reversal of 28838979 is 97983882.

It is an interprime number because it is at equal distance from previous prime (28838977) and next prime (28838981).

It is not a de Polignac number, because 28838979 - 2¹ = 28838977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28838977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4264 + ... + 8709.

Almost surely, 2^28838979 is an apocalyptic number.

28838979 is a deficient number, since it is larger than the sum of its proper divisors (18386381).

28838979 is a wasteful number, since it uses less digits than its factorization.

28838979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13011 (or 13008 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 28838979 is about 5370.1935719302. The cubic root of 28838979 is about 306.6619975397.

The spelling of 28838979 in words is "twenty-eight million, eight hundred thirty-eight thousand, nine hundred seventy-nine".