28259856 has 45 divisors (see below), whose sum is σ = 79267279. Its totient is φ = 9398688.

The previous prime is 28259849. The next prime is 28259873. The reversal of 28259856 is 65895282.

The square root of 28259856 is 5316.

It is a perfect power (a square), and thus also a powerful number.

28259856 is a `hidden beast` number, since 2 + 8 + 2 + 598 + 56 = 666.

It is a super-2 number, since 2×28259856² = 1597238922281472, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (345600) is a multiple of the sum of its prime factors (900).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 63571 + ... + 64013.

Almost surely, 2^28259856 is an apocalyptic number.

28259856 is the 5316-th square number.

It is an amenable number.

28259856 is an abundant number, since it is smaller than the sum of its proper divisors (51007423).

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

28259856 is an equidigital number, since it uses as much as digits as its factorization.

28259856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 448 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The cubic root of 28259856 is about 304.5953821247.

The spelling of 28259856 in words is "twenty-eight million, two hundred fifty-nine thousand, eight hundred fifty-six".