64642984 has 16 divisors (see below), whose sum is σ = 138520800. Its totient is φ = 27704112.

The previous prime is 64642969. The next prime is 64642999. The reversal of 64642984 is 48924646.

It is an interprime number because it is at equal distance from previous prime (64642969) and next prime (64642999).

It is a self number, because there is not a number n which added to its sum of digits gives 64642984.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577114 + ... + 577225.

It is an arithmetic number, because the mean of its divisors is an integer number (8657550).

Almost surely, 2^64642984 is an apocalyptic number.

It is an amenable number.

64642984 is an abundant number, since it is smaller than the sum of its proper divisors (73877816).

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

64642984 is a wasteful number, since it uses less digits than its factorization.

64642984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154352 (or 1154348 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The square root of 64642984 is about 8040.0860691911. The cubic root of 64642984 is about 401.3350888864.

The spelling of 64642984 in words is "sixty-four million, six hundred forty-two thousand, nine hundred eighty-four".