28117296 has 30 divisors (see below), whose sum is σ = 78689780. Its totient is φ = 9372384.

The previous prime is 28117277. The next prime is 28117333. The reversal of 28117296 is 69271182.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28117296.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 97486 + ... + 97773.

Almost surely, 2^28117296 is an apocalyptic number.

It is an amenable number.

28117296 is an abundant number, since it is smaller than the sum of its proper divisors (50572484).

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

28117296 is a wasteful number, since it uses less digits than its factorization.

28117296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195273 (or 195264 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 28117296 is about 5302.5744690669. The cubic root of 28117296 is about 304.0823299634.

The spelling of 28117296 in words is "twenty-eight million, one hundred seventeen thousand, two hundred ninety-six".