311868564 has 24 divisors (see below), whose sum is σ = 831649728. Its totient is φ = 89105280.

The previous prime is 311868563. The next prime is 311868593. The reversal of 311868564 is 465868113.

311868564 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×311868564² = 194524002422844192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311868563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856277 + ... + 1856444.

It is an arithmetic number, because the mean of its divisors is an integer number (34652072).

Almost surely, 2^311868564 is an apocalyptic number.

It is an amenable number.

311868564 is an abundant number, since it is smaller than the sum of its proper divisors (519781164).

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

311868564 is a wasteful number, since it uses less digits than its factorization.

311868564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712735 (or 3712733 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 311868564 is about 17659.8007916284. The cubic root of 311868564 is about 678.1470343566.

The spelling of 311868564 in words is "three hundred eleven million, eight hundred sixty-eight thousand, five hundred sixty-four".