64647372 has 48 divisors (see below), whose sum is σ = 156022272. Its totient is φ = 20821440.

The previous prime is 64647347. The next prime is 64647383. The reversal of 64647372 is 27374646.

It is a self number, because there is not a number n which added to its sum of digits gives 64647372.

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, 46122 + ... + 47502.

It is an arithmetic number, because the mean of its divisors is an integer number (3250464).

Almost surely, 2^64647372 is an apocalyptic number.

It is an amenable number.

64647372 is an abundant number, since it is smaller than the sum of its proper divisors (91374900).

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

64647372 is a wasteful number, since it uses less digits than its factorization.

64647372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1516 counting only the distinct ones).

The product of its digits is 169344, while the sum is 39.

The square root of 64647372 is about 8040.3589472112. The cubic root of 64647372 is about 401.3441696270.

The spelling of 64647372 in words is "sixty-four million, six hundred forty-seven thousand, three hundred seventy-two".