64890692 has 12 divisors (see below), whose sum is σ = 114321900. Its totient is φ = 32227296.

The previous prime is 64890677. The next prime is 64890731. The reversal of 64890692 is 29609846.

It can be written as a sum of positive squares in 2 ways, for example, as 33709636 + 31181056 = 5806^2 + 5584^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53843 + ... + 55034.

It is an arithmetic number, because the mean of its divisors is an integer number (9526825).

Almost surely, 2^64890692 is an apocalyptic number.

It is an amenable number.

64890692 is a deficient number, since it is larger than the sum of its proper divisors (49431208).

64890692 is a wasteful number, since it uses less digits than its factorization.

64890692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109030 (or 109028 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 64890692 is about 8055.4759015219. The cubic root of 64890692 is about 401.8470660724.

The spelling of 64890692 in words is "sixty-four million, eight hundred ninety thousand, six hundred ninety-two".