311382140 has 24 divisors (see below), whose sum is σ = 657230112. Its totient is φ = 123919040.

The previous prime is 311382139. The next prime is 311382151. The reversal of 311382140 is 41283113.

It is a super-2 number, since 2×311382140² = 193917674221959200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35576 + ... + 43455.

It is an arithmetic number, because the mean of its divisors is an integer number (27384588).

Almost surely, 2^311382140 is an apocalyptic number.

It is an amenable number.

311382140 is an abundant number, since it is smaller than the sum of its proper divisors (345847972).

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

311382140 is a wasteful number, since it uses less digits than its factorization.

311382140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79237 (or 79235 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 311382140 is about 17646.0233480521. The cubic root of 311382140 is about 677.7942803670.

The spelling of 311382140 in words is "three hundred eleven million, three hundred eighty-two thousand, one hundred forty".