28572292 has 18 divisors (see below), whose sum is σ = 58165422. Its totient is φ = 12245184.

The previous prime is 28572259. The next prime is 28572301. The reversal of 28572292 is 29227582.

It can be written as a sum of positive squares in only one way, i.e., 18113536 + 10458756 = 4256^2 + 3234^2 .

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, 72693 + ... + 73084.

Almost surely, 2^28572292 is an apocalyptic number.

It is an amenable number.

28572292 is an abundant number, since it is smaller than the sum of its proper divisors (29593130).

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

28572292 is a wasteful number, since it uses less digits than its factorization.

28572292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145795 (or 145786 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 28572292 is about 5345.3056039856. The cubic root of 28572292 is about 305.7137882277.

The spelling of 28572292 in words is "twenty-eight million, five hundred seventy-two thousand, two hundred ninety-two".