64339772 has 12 divisors (see below), whose sum is σ = 128679600. Its totient is φ = 27574176.

The previous prime is 64339729. The next prime is 64339789. The reversal of 64339772 is 27793346.

64339772 is an admirable number.

It is a super-2 number, since 2×64339772² = 8279212522023968, which contains 22 as substring.

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, 1148897 + ... + 1148952.

It is an arithmetic number, because the mean of its divisors is an integer number (10723300).

Almost surely, 2^64339772 is an apocalyptic number.

It is an amenable number.

64339772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64339772 is a wasteful number, since it uses less digits than its factorization.

64339772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297860 (or 2297858 counting only the distinct ones).

The product of its digits is 190512, while the sum is 41.

The square root of 64339772 is about 8021.2076397510. The cubic root of 64339772 is about 400.7066093564.

The spelling of 64339772 in words is "sixty-four million, three hundred thirty-nine thousand, seven hundred seventy-two".