28973472 has 48 divisors (see below), whose sum is σ = 82972512. Its totient is φ = 8779520.

The previous prime is 28973411. The next prime is 28973489. The reversal of 28973472 is 27437982.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12663 + ... + 14774.

It is an arithmetic number, because the mean of its divisors is an integer number (1728594).

Almost surely, 2^28973472 is an apocalyptic number.

28973472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28973472 is an abundant number, since it is smaller than the sum of its proper divisors (53999040).

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

28973472 is a wasteful number, since it uses less digits than its factorization.

28973472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27461 (or 27453 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 28973472 is about 5382.7011806341. The cubic root of 28973472 is about 307.1379730455.

The spelling of 28973472 in words is "twenty-eight million, nine hundred seventy-three thousand, four hundred seventy-two".