28570244 has 12 divisors (see below), whose sum is σ = 50236368. Its totient is φ = 14217000.

The previous prime is 28570237. The next prime is 28570247. The reversal of 28570244 is 44207582.

It is a self number, because there is not a number n which added to its sum of digits gives 28570244.

It is not an unprimeable number, because it can be changed into a prime (28570247) by changing a digit.

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, 16082 + ... + 17769.

It is an arithmetic number, because the mean of its divisors is an integer number (4186364).

Almost surely, 2^28570244 is an apocalyptic number.

It is an amenable number.

28570244 is a deficient number, since it is larger than the sum of its proper divisors (21666124).

28570244 is a wasteful number, since it uses less digits than its factorization.

28570244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34066 (or 34064 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 28570244 is about 5345.1140305891. The cubic root of 28570244 is about 305.7064837525.

The spelling of 28570244 in words is "twenty-eight million, five hundred seventy thousand, two hundred forty-four".