331129240 has 128 divisors (see below), whose sum is σ = 838252800. Its totient is φ = 116928000.

The previous prime is 331129231. The next prime is 331129291. The reversal of 331129240 is 42921133.

It is a congruent number.

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, 1319115 + ... + 1319365.

It is an arithmetic number, because the mean of its divisors is an integer number (6548850).

Almost surely, 2^331129240 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 331129240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419126400).

331129240 is an abundant number, since it is smaller than the sum of its proper divisors (507123560).

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

331129240 is a wasteful number, since it uses less digits than its factorization.

331129240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 331129240 is about 18196.9568884470. The cubic root of 331129240 is about 691.8296605917.

The spelling of 331129240 in words is "three hundred thirty-one million, one hundred twenty-nine thousand, two hundred forty".