28504944 has 60 divisors (see below), whose sum is σ = 85916376. Its totient is φ = 8770176.

The previous prime is 28504933. The next prime is 28504961. The reversal of 28504944 is 44940582.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28504899 and 28504908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5742 + ... + 9485.

Almost surely, 2^28504944 is an apocalyptic number.

28504944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28504944 is an abundant number, since it is smaller than the sum of its proper divisors (57411432).

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

28504944 is a wasteful number, since it uses less digits than its factorization.

28504944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15254 (or 15245 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 28504944 is about 5339.0021539610. The cubic root of 28504944 is about 305.4733990373.

The spelling of 28504944 in words is "twenty-eight million, five hundred four thousand, nine hundred forty-four".