28958724 has 18 divisors (see below), whose sum is σ = 73201310. Its totient is φ = 9652896.

The previous prime is 28958711. The next prime is 28958773. The reversal of 28958724 is 42785982.

It can be written as a sum of positive squares in only one way, i.e., 18922500 + 10036224 = 4350^2 + 3168^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 28958724.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 402169 + ... + 402240.

Almost surely, 2^28958724 is an apocalyptic number.

It is an amenable number.

28958724 is an abundant number, since it is smaller than the sum of its proper divisors (44242586).

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

28958724 is a wasteful number, since it uses less digits than its factorization.

28958724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804419 (or 804414 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 28958724 is about 5381.3310621072. The cubic root of 28958724 is about 307.0858513483.

The spelling of 28958724 in words is "twenty-eight million, nine hundred fifty-eight thousand, seven hundred twenty-four".