28973424 has 20 divisors (see below), whose sum is σ = 74848136. Its totient is φ = 9657792.

The previous prime is 28973411. The next prime is 28973489. The reversal of 28973424 is 42437982.

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, 301759 + ... + 301854.

Almost surely, 2^28973424 is an apocalyptic number.

28973424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28973424 is an abundant number, since it is smaller than the sum of its proper divisors (45874712).

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

28973424 is a wasteful number, since it uses less digits than its factorization.

28973424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603624 (or 603618 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 28973424 is about 5382.6967219044. The cubic root of 28973424 is about 307.1378034348.

The spelling of 28973424 in words is "twenty-eight million, nine hundred seventy-three thousand, four hundred twenty-four".