28501444 has 12 divisors (see below), whose sum is σ = 52502800. Its totient is φ = 13500648.

The previous prime is 28501427. The next prime is 28501511. The reversal of 28501444 is 44410582.

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 3 ways as a sum of consecutive naturals, for example, 187434 + ... + 187585.

Almost surely, 2^28501444 is an apocalyptic number.

It is an amenable number.

28501444 is a deficient number, since it is larger than the sum of its proper divisors (24001356).

28501444 is a wasteful number, since it uses less digits than its factorization.

28501444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375042 (or 375040 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 28501444 is about 5338.6743672938. The cubic root of 28501444 is about 305.4608959354.

The spelling of 28501444 in words is "twenty-eight million, five hundred one thousand, four hundred forty-four".