311996440 has 32 divisors (see below), whose sum is σ = 802277280. Its totient is φ = 106970112.

The previous prime is 311996423. The next prime is 311996441. The reversal of 311996440 is 44699113.

It is a super-3 number, since 3×311996440³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 311996440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311996441) 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, 556857 + ... + 557416.

It is an arithmetic number, because the mean of its divisors is an integer number (25071165).

Almost surely, 2^311996440 is an apocalyptic number.

It is an amenable number.

311996440 is an abundant number, since it is smaller than the sum of its proper divisors (490280840).

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

311996440 is a wasteful number, since it uses less digits than its factorization.

311996440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114291 (or 1114287 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 311996440 is about 17663.4209597122. The cubic root of 311996440 is about 678.2397089535.

The spelling of 311996440 in words is "three hundred eleven million, nine hundred ninety-six thousand, four hundred forty".