28117776 has 40 divisors (see below), whose sum is σ = 75798720. Its totient is φ = 8964736.

The previous prime is 28117769. The next prime is 28117783. The reversal of 28117776 is 67771182.

It is an interprime number because it is at equal distance from previous prime (28117769) and next prime (28117783).

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, 11631 + ... + 13838.

It is an arithmetic number, because the mean of its divisors is an integer number (1894968).

Almost surely, 2^28117776 is an apocalyptic number.

It is an amenable number.

28117776 is an abundant number, since it is smaller than the sum of its proper divisors (47680944).

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

28117776 is a wasteful number, since it uses less digits than its factorization.

28117776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25503 (or 25497 counting only the distinct ones).

The product of its digits is 32928, while the sum is 39.

The square root of 28117776 is about 5302.6197299071. The cubic root of 28117776 is about 304.0840603182.

The spelling of 28117776 in words is "twenty-eight million, one hundred seventeen thousand, seven hundred seventy-six".