28572856 has 16 divisors (see below), whose sum is σ = 57695400. Its totient is φ = 13187424.

The previous prime is 28572847. The next prime is 28572871. The reversal of 28572856 is 65827582.

It is a super-3 number, since 3×28572856³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137266 + ... + 137473.

Almost surely, 2^28572856 is an apocalyptic number.

28572856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28572856 is an abundant number, since it is smaller than the sum of its proper divisors (29122544).

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

28572856 is a wasteful number, since it uses less digits than its factorization.

28572856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274758 (or 274754 counting only the distinct ones).

The product of its digits is 268800, while the sum is 43.

The square root of 28572856 is about 5345.3583602973. The cubic root of 28572856 is about 305.7157997504.

The spelling of 28572856 in words is "twenty-eight million, five hundred seventy-two thousand, eight hundred fifty-six".