28559986 has 24 divisors (see below), whose sum is σ = 53020224. Its totient is φ = 11297520.

The previous prime is 28559977. The next prime is 28560019. The reversal of 28559986 is 68995582.

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, 3670 + ... + 8401.

It is an arithmetic number, because the mean of its divisors is an integer number (2209176).

Almost surely, 2^28559986 is an apocalyptic number.

28559986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28559986 is a deficient number, since it is larger than the sum of its proper divisors (24460238).

28559986 is a wasteful number, since it uses less digits than its factorization.

28559986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12106 (or 12093 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 52.

The square root of 28559986 is about 5344.1543765127. The cubic root of 28559986 is about 305.6698919229.

The spelling of 28559986 in words is "twenty-eight million, five hundred fifty-nine thousand, nine hundred eighty-six".