64520304 has 80 divisors (see below), whose sum is σ = 181336608. Its totient is φ = 19685376.

The previous prime is 64520297. The next prime is 64520311. The reversal of 64520304 is 40302546.

64520304 = 35² + 36² + ... + 578².

It is an interprime number because it is at equal distance from previous prime (64520297) and next prime (64520311).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 29124 + ... + 31260.

Almost surely, 2^64520304 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 64520304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90668304).

64520304 is an abundant number, since it is smaller than the sum of its proper divisors (116816304).

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

64520304 is a wasteful number, since it uses less digits than its factorization.

64520304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2196 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 64520304 is about 8032.4531744667. The cubic root of 64520304 is about 401.0810424030.

The spelling of 64520304 in words is "sixty-four million, five hundred twenty thousand, three hundred four".