64857994 has 8 divisors (see below), whose sum is σ = 97322148. Its totient is φ = 32417280.

The previous prime is 64857971. The next prime is 64858019. The reversal of 64857994 is 49975846.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61387225 + 3470769 = 7835^2 + 1863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 5344 + ... + 12580.

Almost surely, 2^64857994 is an apocalyptic number.

64857994 is a deficient number, since it is larger than the sum of its proper divisors (32464154).

64857994 is a wasteful number, since it uses less digits than its factorization.

64857994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11720.

The product of its digits is 2177280, while the sum is 52.

The square root of 64857994 is about 8053.4460946852. The cubic root of 64857994 is about 401.7795586865.

The spelling of 64857994 in words is "sixty-four million, eight hundred fifty-seven thousand, nine hundred ninety-four".