28544680 has 32 divisors (see below), whose sum is σ = 65190240. Its totient is φ = 11246400.

The previous prime is 28544657. The next prime is 28544693. The reversal of 28544680 is 8644582.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

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, 2646 + ... + 8005.

It is an arithmetic number, because the mean of its divisors is an integer number (2037195).

Almost surely, 2^28544680 is an apocalyptic number.

28544680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28544680 is an abundant number, since it is smaller than the sum of its proper divisors (36645560).

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

28544680 is a wasteful number, since it uses less digits than its factorization.

28544680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10729 (or 10725 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 28544680 is about 5342.7221526110. The cubic root of 28544680 is about 305.6152768237.

The spelling of 28544680 in words is "twenty-eight million, five hundred forty-four thousand, six hundred eighty".