27989736 has 32 divisors (see below), whose sum is σ = 73658400. Its totient is φ = 8838720.

The previous prime is 27989729. The next prime is 27989737. The reversal of 27989736 is 63798972.

It is not an unprimeable number, because it can be changed into a prime (27989737) by changing a digit.

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, 30235 + ... + 31146.

It is an arithmetic number, because the mean of its divisors is an integer number (2301825).

Almost surely, 2^27989736 is an apocalyptic number.

It is an amenable number.

27989736 is an abundant number, since it is smaller than the sum of its proper divisors (45668664).

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

27989736 is a wasteful number, since it uses less digits than its factorization.

27989736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61409 (or 61405 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 51.

The square root of 27989736 is about 5290.5326763947. The cubic root of 27989736 is about 303.6217884276.

The spelling of 27989736 in words is "twenty-seven million, nine hundred eighty-nine thousand, seven hundred thirty-six".