64889672 has 16 divisors (see below), whose sum is σ = 122874300. Its totient is φ = 32123200.

The previous prime is 64889659. The next prime is 64889681. The reversal of 64889672 is 27698846.

64889672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 50495236 + 14394436 = 7106^2 + 3794^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64889672.

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 3 ways as a sum of consecutive naturals, for example, 39347 + ... + 40962.

Almost surely, 2^64889672 is an apocalyptic number.

It is an amenable number.

64889672 is a deficient number, since it is larger than the sum of its proper divisors (57984628).

64889672 is a wasteful number, since it uses less digits than its factorization.

64889672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80416 (or 80412 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The square root of 64889672 is about 8055.4125903022. The cubic root of 64889672 is about 401.8449605514.

The spelling of 64889672 in words is "sixty-four million, eight hundred eighty-nine thousand, six hundred seventy-two".