64709984 has 12 divisors (see below), whose sum is σ = 127397844. Its totient is φ = 32354976.

The previous prime is 64709963. The next prime is 64709987. The reversal of 64709984 is 48990746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64709987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1011062 + ... + 1011125.

It is an arithmetic number, because the mean of its divisors is an integer number (10616487).

Almost surely, 2^64709984 is an apocalyptic number.

It is an amenable number.

64709984 is a deficient number, since it is larger than the sum of its proper divisors (62687860).

64709984 is a wasteful number, since it uses less digits than its factorization.

64709984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022197 (or 2022189 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 64709984 is about 8044.2516121762. The cubic root of 64709984 is about 401.4736972069.

The spelling of 64709984 in words is "sixty-four million, seven hundred nine thousand, nine hundred eighty-four".