64722072 has 32 divisors (see below), whose sum is σ = 163759680. Its totient is φ = 21313440.

The previous prime is 64722059. The next prime is 64722083. The reversal of 64722072 is 27022746.

It is a congruent number.

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, 14254 + ... + 18237.

It is an arithmetic number, because the mean of its divisors is an integer number (5117490).

Almost surely, 2^64722072 is an apocalyptic number.

It is an amenable number.

64722072 is an abundant number, since it is smaller than the sum of its proper divisors (99037608).

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

64722072 is a wasteful number, since it uses less digits than its factorization.

64722072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32583 (or 32579 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 64722072 is about 8045.0029210685. The cubic root of 64722072 is about 401.4986944412.

The spelling of 64722072 in words is "sixty-four million, seven hundred twenty-two thousand, seventy-two".