64218984 has 32 divisors (see below), whose sum is σ = 161485920. Its totient is φ = 21281216.

The previous prime is 64218971. The next prime is 64218989. The reversal of 64218984 is 48981246.

It is not an unprimeable number, because it can be changed into a prime (64218989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3582 + ... + 11885.

It is an arithmetic number, because the mean of its divisors is an integer number (5046435).

Almost surely, 2^64218984 is an apocalyptic number.

It is an amenable number.

64218984 is an abundant number, since it is smaller than the sum of its proper divisors (97266936).

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

64218984 is a wasteful number, since it uses less digits than its factorization.

64218984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15649 (or 15645 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 64218984 is about 8013.6748124690. The cubic root of 64218984 is about 400.4556973194.

The spelling of 64218984 in words is "sixty-four million, two hundred eighteen thousand, nine hundred eighty-four".