311343138 has 24 divisors (see below), whose sum is σ = 675198576. Its totient is φ = 103685400.

The previous prime is 311343127. The next prime is 311343191. The reversal of 311343138 is 831343113.

311343138 is a `hidden beast` number, since 311 + 34 + 313 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13693 + ... + 28463.

It is an arithmetic number, because the mean of its divisors is an integer number (28133274).

Almost surely, 2^311343138 is an apocalyptic number.

311343138 is an abundant number, since it is smaller than the sum of its proper divisors (363855438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311343138 is a wasteful number, since it uses less digits than its factorization.

311343138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15950 (or 15947 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 311343138 is about 17644.9181919328. The cubic root of 311343138 is about 677.7659802678.

The spelling of 311343138 in words is "three hundred eleven million, three hundred forty-three thousand, one hundred thirty-eight".