311434872 has 32 divisors (see below), whose sum is σ = 889814400. Its totient is φ = 88981344.

The previous prime is 311434867. The next prime is 311434873. The reversal of 311434872 is 278434113.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311434873) 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, 926722 + ... + 927057.

It is an arithmetic number, because the mean of its divisors is an integer number (27806700).

Almost surely, 2^311434872 is an apocalyptic number.

It is an amenable number.

311434872 is an abundant number, since it is smaller than the sum of its proper divisors (578379528).

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

311434872 is a wasteful number, since it uses less digits than its factorization.

311434872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853795 (or 1853791 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 311434872 is about 17647.5174458052. The cubic root of 311434872 is about 677.8325392843.

Adding to 311434872 its reverse (278434113), we get a palindrome (589868985).

The spelling of 311434872 in words is "three hundred eleven million, four hundred thirty-four thousand, eight hundred seventy-two".