28724552 has 16 divisors (see below), whose sum is σ = 54354300. Its totient is φ = 14230080.

The previous prime is 28724503. The next prime is 28724581. The reversal of 28724552 is 25542782.

It can be written as a sum of positive squares in 2 ways, for example, as 25745476 + 2979076 = 5074^2 + 1726^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15599 + ... + 17342.

Almost surely, 2^28724552 is an apocalyptic number.

It is an amenable number.

28724552 is a deficient number, since it is larger than the sum of its proper divisors (25629748).

28724552 is a wasteful number, since it uses less digits than its factorization.

28724552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33056 (or 33052 counting only the distinct ones).

The product of its digits is 44800, while the sum is 35.

The square root of 28724552 is about 5359.5290837909. The cubic root of 28724552 is about 306.2558698306.

The spelling of 28724552 in words is "twenty-eight million, seven hundred twenty-four thousand, five hundred fifty-two".