28244004 has 24 divisors (see below), whose sum is σ = 69779808. Its totient is φ = 8860800.

The previous prime is 28243973. The next prime is 28244017. The reversal of 28244004 is 40044282.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 69022 + ... + 69429.

It is an arithmetic number, because the mean of its divisors is an integer number (2907492).

Almost surely, 2^28244004 is an apocalyptic number.

It is an amenable number.

28244004 is an abundant number, since it is smaller than the sum of its proper divisors (41535804).

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

28244004 is a wasteful number, since it uses less digits than its factorization.

28244004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138475 (or 138473 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 28244004 is about 5314.5088202015. The cubic root of 28244004 is about 304.5384185283.

Adding to 28244004 its reverse (40044282), we get a palindrome (68288286).

The spelling of 28244004 in words is "twenty-eight million, two hundred forty-four thousand, four".