64672388 has 24 divisors (see below), whose sum is σ = 123669504. Its totient is φ = 29348000.

The previous prime is 64672367. The next prime is 64672397. The reversal of 64672388 is 88327646.

64672388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50006 + ... + 51282.

It is an arithmetic number, because the mean of its divisors is an integer number (5152896).

Almost surely, 2^64672388 is an apocalyptic number.

It is an amenable number.

64672388 is a deficient number, since it is larger than the sum of its proper divisors (58997116).

64672388 is a wasteful number, since it uses less digits than its factorization.

64672388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443 (or 2441 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 64672388 is about 8041.9144486870. The cubic root of 64672388 is about 401.3959311072.

The spelling of 64672388 in words is "sixty-four million, six hundred seventy-two thousand, three hundred eighty-eight".