64707984 has 240 divisors, whose sum is σ = 219360960. Its totient is φ = 18247680.

The previous prime is 64707983. The next prime is 64707989. The reversal of 64707984 is 48970746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64707983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 727012 + ... + 727100.

It is an arithmetic number, because the mean of its divisors is an integer number (914004).

Almost surely, 2^64707984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64707984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109680480).

64707984 is an abundant number, since it is smaller than the sum of its proper divisors (154652976).

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

64707984 is a wasteful number, since it uses less digits than its factorization.

64707984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 64707984 is about 8044.1272988435. The cubic root of 64707984 is about 401.4695610308.

The spelling of 64707984 in words is "sixty-four million, seven hundred seven thousand, nine hundred eighty-four".