28564944 has 40 divisors (see below), whose sum is σ = 74028000. Its totient is φ = 9491328.

The previous prime is 28564891. The next prime is 28564951. The reversal of 28564944 is 44946582.

It is a junction number, because it is equal to n+sod(n) for n = 28564896 and 28564905.

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, 18307 + ... + 19805.

It is an arithmetic number, because the mean of its divisors is an integer number (1850700).

Almost surely, 2^28564944 is an apocalyptic number.

28564944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28564944 is an abundant number, since it is smaller than the sum of its proper divisors (45463056).

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

28564944 is a wasteful number, since it uses less digits than its factorization.

28564944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907 (or 1901 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 28564944 is about 5344.6182277128. The cubic root of 28564944 is about 305.6875789488.

The spelling of 28564944 in words is "twenty-eight million, five hundred sixty-four thousand, nine hundred forty-four".