28704372 has 24 divisors (see below), whose sum is σ = 67114656. Its totient is φ = 9548448.

The previous prime is 28704371. The next prime is 28704397. The reversal of 28704372 is 27340782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28704371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4378 + ... + 8750.

It is an arithmetic number, because the mean of its divisors is an integer number (2796444).

Almost surely, 2^28704372 is an apocalyptic number.

It is an amenable number.

28704372 is an abundant number, since it is smaller than the sum of its proper divisors (38410284).

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

28704372 is a wasteful number, since it uses less digits than its factorization.

28704372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4927 (or 4925 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 28704372 is about 5357.6461249321. The cubic root of 28704372 is about 306.1841345511.

The spelling of 28704372 in words is "twenty-eight million, seven hundred four thousand, three hundred seventy-two".