64338520 has 16 divisors (see below), whose sum is σ = 144761760. Its totient is φ = 25735392.

The previous prime is 64338511. The next prime is 64338539. The reversal of 64338520 is 2583346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 804192 + ... + 804271.

It is an arithmetic number, because the mean of its divisors is an integer number (9047610).

Almost surely, 2^64338520 is an apocalyptic number.

It is an amenable number.

64338520 is an abundant number, since it is smaller than the sum of its proper divisors (80423240).

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

64338520 is a wasteful number, since it uses less digits than its factorization.

64338520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608474 (or 1608470 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 64338520 is about 8021.1295962601. The cubic root of 64338520 is about 400.7040101972.

The spelling of 64338520 in words is "sixty-four million, three hundred thirty-eight thousand, five hundred twenty".