64760320 has 80 divisors (see below), whose sum is σ = 159317928. Its totient is φ = 25231360.

The previous prime is 64760299. The next prime is 64760351. The reversal of 64760320 is 2306746.

It can be written as a sum of positive squares in 4 ways, for example, as 15872256 + 48888064 = 3984^2 + 6992^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104652 + ... + 105268.

Almost surely, 2^64760320 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 64760320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79658964).

64760320 is an abundant number, since it is smaller than the sum of its proper divisors (94557608).

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

64760320 is an equidigital number, since it uses as much as digits as its factorization.

64760320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 64760320 is about 8047.3796977650. The cubic root of 64760320 is about 401.5777684344.

It can be divided in two parts, 64 and 760320, that added together give a square (760384 = 872²).

The spelling of 64760320 in words is "sixty-four million, seven hundred sixty thousand, three hundred twenty".