311145492 has 108 divisors (see below), whose sum is σ = 897628704. Its totient is φ = 83623680.

The previous prime is 311145487. The next prime is 311145493. The reversal of 311145492 is 294541113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311145493) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 169017 + ... + 170847.

Almost surely, 2^311145492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311145492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448814352).

311145492 is an abundant number, since it is smaller than the sum of its proper divisors (586483212).

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

311145492 is a wasteful number, since it uses less digits than its factorization.

311145492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886 (or 1860 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 311145492 is about 17639.3166534308. The cubic root of 311145492 is about 677.6225307264.

The spelling of 311145492 in words is "three hundred eleven million, one hundred forty-five thousand, four hundred ninety-two".