28504226 has 16 divisors (see below), whose sum is σ = 43423800. Its totient is φ = 14031360.

The previous prime is 28504219. The next prime is 28504243. The reversal of 28504226 is 62240582.

It can be written as a sum of positive squares in 4 ways, for example, as 17935225 + 10569001 = 4235^2 + 3251^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67496 + ... + 67916.

Almost surely, 2^28504226 is an apocalyptic number.

28504226 is a deficient number, since it is larger than the sum of its proper divisors (14919574).

28504226 is a wasteful number, since it uses less digits than its factorization.

28504226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 28504226 is about 5338.9349125083. The cubic root of 28504226 is about 305.4708341987.

The spelling of 28504226 in words is "twenty-eight million, five hundred four thousand, two hundred twenty-six".