28858724 has 24 divisors (see below), whose sum is σ = 53658360. Its totient is φ = 13533696.

The previous prime is 28858699. The next prime is 28858733. The reversal of 28858724 is 42785882.

It can be written as a sum of positive squares in 4 ways, for example, as 9498724 + 19360000 = 3082^2 + 4400^2 .

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, 26462 + ... + 27530.

It is an arithmetic number, because the mean of its divisors is an integer number (2235765).

Almost surely, 2^28858724 is an apocalyptic number.

It is an amenable number.

28858724 is a deficient number, since it is larger than the sum of its proper divisors (24799636).

28858724 is a wasteful number, since it uses less digits than its factorization.

28858724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487 (or 1485 counting only the distinct ones).

The product of its digits is 286720, while the sum is 44.

The square root of 28858724 is about 5372.0316454764. The cubic root of 28858724 is about 306.7319683453.

The spelling of 28858724 in words is "twenty-eight million, eight hundred fifty-eight thousand, seven hundred twenty-four".