64689394 has 32 divisors (see below), whose sum is σ = 124258176. Its totient is φ = 24520320.

The previous prime is 64689367. The next prime is 64689407. The reversal of 64689394 is 49398646.

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, 22 + ... + 11374.

It is an arithmetic number, because the mean of its divisors is an integer number (3883068).

Almost surely, 2^64689394 is an apocalyptic number.

64689394 is a deficient number, since it is larger than the sum of its proper divisors (59568782).

64689394 is a wasteful number, since it uses less digits than its factorization.

64689394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11410.

The product of its digits is 1119744, while the sum is 49.

The square root of 64689394 is about 8042.9717144846. The cubic root of 64689394 is about 401.4311111956.

The spelling of 64689394 in words is "sixty-four million, six hundred eighty-nine thousand, three hundred ninety-four".