64496320 has 56 divisors (see below), whose sum is σ = 175528224. Its totient is φ = 22112256.

The previous prime is 64496309. The next prime is 64496323. The reversal of 64496320 is 2369446.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (64496323) 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, 12157 + ... + 16636.

Almost surely, 2^64496320 is an apocalyptic number.

It is an amenable number.

64496320 is an abundant number, since it is smaller than the sum of its proper divisors (111031904).

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

64496320 is a wasteful number, since it uses less digits than its factorization.

64496320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28817 (or 28807 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 64496320 is about 8030.9600920438. The cubic root of 64496320 is about 401.0313385665.

It can be divided in two parts, 6449 and 6320, that added together give a square (12769 = 113²).

The spelling of 64496320 in words is "sixty-four million, four hundred ninety-six thousand, three hundred twenty".