64671328 has 12 divisors (see below), whose sum is σ = 127321740. Its totient is φ = 32335648.

The previous prime is 64671323. The next prime is 64671329. The reversal of 64671328 is 82317646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64671323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010458 + ... + 1010521.

It is an arithmetic number, because the mean of its divisors is an integer number (10610145).

Almost surely, 2^64671328 is an apocalyptic number.

It is an amenable number.

64671328 is a deficient number, since it is larger than the sum of its proper divisors (62650412).

64671328 is a wasteful number, since it uses less digits than its factorization.

64671328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020989 (or 2020981 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 64671328 is about 8041.8485437118. The cubic root of 64671328 is about 401.3937380950.

The spelling of 64671328 in words is "sixty-four million, six hundred seventy-one thousand, three hundred twenty-eight".