28872444 has 24 divisors (see below), whose sum is σ = 68376448. Its totient is φ = 9480240.

The previous prime is 28872433. The next prime is 28872451. The reversal of 28872444 is 44427882.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 17152 + ... + 18759.

Almost surely, 2^28872444 is an apocalyptic number.

It is an amenable number.

28872444 is an abundant number, since it is smaller than the sum of its proper divisors (39504004).

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

28872444 is a wasteful number, since it uses less digits than its factorization.

28872444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35985 (or 35983 counting only the distinct ones).

The product of its digits is 114688, while the sum is 39.

The square root of 28872444 is about 5373.3084780236. The cubic root of 28872444 is about 306.7805694300.

The spelling of 28872444 in words is "twenty-eight million, eight hundred seventy-two thousand, four hundred forty-four".