28973512 has 16 divisors (see below), whose sum is σ = 54886860. Its totient is φ = 14337024.

The previous prime is 28973509. The next prime is 28973513. The reversal of 28973512 is 21537982.

It can be written as a sum of positive squares in 2 ways, for example, as 28879876 + 93636 = 5374^2 + 306^2 .

It is a super-2 number, since 2×28973512² = 1678928795228288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28973513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17893 + ... + 19444.

Almost surely, 2^28973512 is an apocalyptic number.

It is an amenable number.

28973512 is a deficient number, since it is larger than the sum of its proper divisors (25913348).

28973512 is a wasteful number, since it uses less digits than its factorization.

28973512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37440 (or 37436 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 28973512 is about 5382.7048962394. The cubic root of 28973512 is about 307.1381143876.

The spelling of 28973512 in words is "twenty-eight million, nine hundred seventy-three thousand, five hundred twelve".