28533908072 has 32 divisors (see below), whose sum is σ = 54524719080. Its totient is φ = 13994123520.

The previous prime is 28533908033. The next prime is 28533908083. The reversal of 28533908072 is 27080933582.

It can be written as a sum of positive squares in 4 ways, for example, as 16834024516 + 11699883556 = 129746^2 + 108166^2 .

It is a super-2 number, since 2×28533908072² (a number of 22 digits) contains 22 as substring.

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, 2407922 + ... + 2419742.

Almost surely, 2^28533908072 is an apocalyptic number.

It is an amenable number.

28533908072 is a deficient number, since it is larger than the sum of its proper divisors (25990811008).

28533908072 is a wasteful number, since it uses less digits than its factorization.

28533908072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17573 (or 17569 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 28533908072 in words is "twenty-eight billion, five hundred thirty-three million, nine hundred eight thousand, seventy-two".