311134340 has 96 divisors (see below), whose sum is σ = 787739904. Its totient is φ = 101826560.

The previous prime is 311134339. The next prime is 311134361. The reversal of 311134340 is 43431113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84212 + ... + 87828.

It is an arithmetic number, because the mean of its divisors is an integer number (8205624).

Almost surely, 2^311134340 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 311134340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393869952).

311134340 is an abundant number, since it is smaller than the sum of its proper divisors (476605564).

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

311134340 is a wasteful number, since it uses less digits than its factorization.

311134340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677 (or 3675 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 311134340 is about 17639.0005385793. Note that the first 3 decimals coincide. The cubic root of 311134340 is about 677.6144349031.

Adding to 311134340 its reverse (43431113), we get a palindrome (354565453).

It can be divided in two parts, 31113 and 4340, that added together give a palindrome (35453).

The spelling of 311134340 in words is "three hundred eleven million, one hundred thirty-four thousand, three hundred forty".