64457072 has 20 divisors (see below), whose sum is σ = 125872896. Its totient is φ = 31973760.

The previous prime is 64457059. The next prime is 64457077. The reversal of 64457072 is 27075446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64457077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13829 + ... + 17892.

Almost surely, 2^64457072 is an apocalyptic number.

It is an amenable number.

64457072 is a deficient number, since it is larger than the sum of its proper divisors (61415824).

64457072 is a wasteful number, since it uses less digits than its factorization.

64457072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31856 (or 31850 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 64457072 is about 8028.5161767290. The cubic root of 64457072 is about 400.9499754141.

The spelling of 64457072 in words is "sixty-four million, four hundred fifty-seven thousand, seventy-two".