28297204 has 12 divisors (see below), whose sum is σ = 53329444. Its totient is φ = 13060224.

The previous prime is 28297201. The next prime is 28297219. The reversal of 28297204 is 40279282.

It can be written as a sum of positive squares in 2 ways, for example, as 13704804 + 14592400 = 3702^2 + 3820^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28297204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28297201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272037 + ... + 272140.

Almost surely, 2^28297204 is an apocalyptic number.

It is an amenable number.

28297204 is a deficient number, since it is larger than the sum of its proper divisors (25032240).

28297204 is a wasteful number, since it uses less digits than its factorization.

28297204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544194 (or 544192 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28297204 is about 5319.5116317196. The cubic root of 28297204 is about 304.7295066642.

The spelling of 28297204 in words is "twenty-eight million, two hundred ninety-seven thousand, two hundred four".