311144020 has 24 divisors (see below), whose sum is σ = 712803168. Its totient is φ = 113143200.

The previous prime is 311144011. The next prime is 311144027. The reversal of 311144020 is 20441113.

It is a junction number, because it is equal to n+sod(n) for n = 311143985 and 311144003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311144027) 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, 706926 + ... + 707365.

It is an arithmetic number, because the mean of its divisors is an integer number (29700132).

Almost surely, 2^311144020 is an apocalyptic number.

It is an amenable number.

311144020 is an abundant number, since it is smaller than the sum of its proper divisors (401659148).

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

311144020 is a wasteful number, since it uses less digits than its factorization.

311144020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414311 (or 1414309 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 311144020 is about 17639.2749284090. The cubic root of 311144020 is about 677.6214621352.

Adding to 311144020 its reverse (20441113), we get a palindrome (331585133).

The spelling of 311144020 in words is "three hundred eleven million, one hundred forty-four thousand, twenty".