64986984 has 24 divisors (see below), whose sum is σ = 176006610. Its totient is φ = 21662304.

The previous prime is 64986979. The next prime is 64986991. The reversal of 64986984 is 48968946.

It can be written as a sum of positive squares in only one way, i.e., 62062884 + 2924100 = 7878^2 + 1710^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 64986984.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 451227 + ... + 451370.

Almost surely, 2^64986984 is an apocalyptic number.

It is an amenable number.

64986984 is an abundant number, since it is smaller than the sum of its proper divisors (111019626).

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

64986984 is a wasteful number, since it uses less digits than its factorization.

64986984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902609 (or 902602 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 64986984 is about 8061.4504898312. The cubic root of 64986984 is about 402.0457362384.

The spelling of 64986984 in words is "sixty-four million, nine hundred eighty-six thousand, nine hundred eighty-four".