311668618 has 8 divisors (see below), whose sum is σ = 468051012. Its totient is φ = 155651616.

The previous prime is 311668589. The next prime is 311668619. The reversal of 311668618 is 816866113.

It can be written as a sum of positive squares in 2 ways, for example, as 211208089 + 100460529 = 14533^2 + 10023^2 .

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

It is not an unprimeable number, because it can be changed into a prime (311668619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89205 + ... + 92632.

Almost surely, 2^311668618 is an apocalyptic number.

311668618 is a deficient number, since it is larger than the sum of its proper divisors (156382394).

311668618 is a wasteful number, since it uses less digits than its factorization.

311668618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182696.

The product of its digits is 41472, while the sum is 40.

The square root of 311668618 is about 17654.1388348455. The cubic root of 311668618 is about 678.0020782329.

The spelling of 311668618 in words is "three hundred eleven million, six hundred sixty-eight thousand, six hundred eighteen".