28976388 has 24 divisors (see below), whose sum is σ = 77270592. Its totient is φ = 8278944.

The previous prime is 28976377. The next prime is 28976399. The reversal of 28976388 is 88367982.

It is an interprime number because it is at equal distance from previous prime (28976377) and next prime (28976399).

It is a self number, because there is not a number n which added to its sum of digits gives 28976388.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172395 + ... + 172562.

It is an arithmetic number, because the mean of its divisors is an integer number (3219608).

Almost surely, 2^28976388 is an apocalyptic number.

28976388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28976388 is an abundant number, since it is smaller than the sum of its proper divisors (48294204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28976388 is a wasteful number, since it uses less digits than its factorization.

28976388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344971 (or 344969 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 28976388 is about 5382.9720415399. The cubic root of 28976388 is about 307.1482765430.

The spelling of 28976388 in words is "twenty-eight million, nine hundred seventy-six thousand, three hundred eighty-eight".