64380864 has 112 divisors (see below), whose sum is σ = 181416960. Its totient is φ = 20106240.

The previous prime is 64380857. The next prime is 64380881. The reversal of 64380864 is 46808346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269257 + ... + 269495.

Almost surely, 2^64380864 is an apocalyptic number.

64380864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64380864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90708480).

64380864 is an abundant number, since it is smaller than the sum of its proper divisors (117036096).

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

64380864 is a wasteful number, since it uses less digits than its factorization.

64380864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 64380864 is about 8023.7686905842. The cubic root of 64380864 is about 400.7918978765.

The spelling of 64380864 in words is "sixty-four million, three hundred eighty thousand, eight hundred sixty-four".