311850020 has 12 divisors (see below), whose sum is σ = 654885084. Its totient is φ = 124740000.

The previous prime is 311849999. The next prime is 311850043. The reversal of 311850020 is 20058113.

It can be written as a sum of positive squares in 2 ways, for example, as 170668096 + 141181924 = 13064^2 + 11882^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 15592501 = 311850020 / (3 + 1 + 1 + 8 + 5 + 0 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 311849974 and 311850001.

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, 7796231 + ... + 7796270.

It is an arithmetic number, because the mean of its divisors is an integer number (54573757).

Almost surely, 2^311850020 is an apocalyptic number.

It is an amenable number.

311850020 is an abundant number, since it is smaller than the sum of its proper divisors (343035064).

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

311850020 is a wasteful number, since it uses less digits than its factorization.

311850020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15592510 (or 15592508 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 311850020 is about 17659.2757495884. The cubic root of 311850020 is about 678.1335930020.

The spelling of 311850020 in words is "three hundred eleven million, eight hundred fifty thousand, twenty".