28724562 has 24 divisors (see below), whose sum is σ = 64943424. Its totient is φ = 9158424.

The previous prime is 28724503. The next prime is 28724581. The reversal of 28724562 is 26542782.

28724562 is a `hidden beast` number, since 28 + 72 + 4 + 562 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34278 + ... + 35105.

It is an arithmetic number, because the mean of its divisors is an integer number (2705976).

Almost surely, 2^28724562 is an apocalyptic number.

28724562 is an abundant number, since it is smaller than the sum of its proper divisors (36218862).

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

28724562 is a wasteful number, since it uses less digits than its factorization.

28724562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69414 (or 69411 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 28724562 is about 5359.5300167086. The cubic root of 28724562 is about 306.2559053700.

The spelling of 28724562 in words is "twenty-eight million, seven hundred twenty-four thousand, five hundred sixty-two".