311245404 has 12 divisors (see below), whose sum is σ = 726239304. Its totient is φ = 103748464.

The previous prime is 311245393. The next prime is 311245423. The reversal of 311245404 is 404542113.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×311245404² = 193747403022246432, 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 3 ways as a sum of consecutive naturals, for example, 12968547 + ... + 12968570.

It is an arithmetic number, because the mean of its divisors is an integer number (60519942).

Almost surely, 2^311245404 is an apocalyptic number.

It is an amenable number.

311245404 is an abundant number, since it is smaller than the sum of its proper divisors (414993900).

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

311245404 is a wasteful number, since it uses less digits than its factorization.

311245404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25937124 (or 25937122 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 311245404 is about 17642.1485086142. The cubic root of 311245404 is about 677.6950534729.

Adding to 311245404 its reverse (404542113), we get a palindrome (715787517).

It can be divided in two parts, 3112 and 45404, that added together give a triangular number (48516 = T₃₁₁).

The spelling of 311245404 in words is "three hundred eleven million, two hundred forty-five thousand, four hundred four".