28298256 has 40 divisors (see below), whose sum is σ = 83548224. Its totient is φ = 8085120.

The previous prime is 28298213. The next prime is 28298261. The reversal of 28298256 is 65289282.

28298256 = 238² + 239² + ... + 461².

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 41775 + ... + 42446.

Almost surely, 2^28298256 is an apocalyptic number.

It is an amenable number.

28298256 is an abundant number, since it is smaller than the sum of its proper divisors (55249968).

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

28298256 is a wasteful number, since it uses less digits than its factorization.

28298256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84239 (or 84233 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 28298256 is about 5319.6105120582. The cubic root of 28298256 is about 304.7332829085.

The spelling of 28298256 in words is "twenty-eight million, two hundred ninety-eight thousand, two hundred fifty-six".