28757572 has 12 divisors (see below), whose sum is σ = 50528016. Its totient is φ = 14321000.

The previous prime is 28757569. The next prime is 28757581. The reversal of 28757572 is 27575782.

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 3 ways as a sum of consecutive naturals, for example, 13318 + ... + 15325.

It is an arithmetic number, because the mean of its divisors is an integer number (4210668).

Almost surely, 2^28757572 is an apocalyptic number.

It is an amenable number.

28757572 is a deficient number, since it is larger than the sum of its proper divisors (21770444).

28757572 is a wasteful number, since it uses less digits than its factorization.

28757572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28898 (or 28896 counting only the distinct ones).

The product of its digits is 274400, while the sum is 43.

The square root of 28757572 is about 5362.6086935371. The cubic root of 28757572 is about 306.3731759405.

The spelling of 28757572 in words is "twenty-eight million, seven hundred fifty-seven thousand, five hundred seventy-two".