331252740 has 432 divisors, whose sum is σ = 1317580992. Its totient is φ = 69237504.

The previous prime is 331252717. The next prime is 331252741. The reversal of 331252740 is 47252133.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (331252741) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3095767 + ... + 3095873.

It is an arithmetic number, because the mean of its divisors is an integer number (3049956).

Almost surely, 2^331252740 is an apocalyptic number.

331252740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331252740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658790496).

331252740 is an abundant number, since it is smaller than the sum of its proper divisors (986328252).

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

331252740 is a wasteful number, since it uses less digits than its factorization.

331252740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 331252740 is about 18200.3499966347. The cubic root of 331252740 is about 691.9156595842.

The spelling of 331252740 in words is "three hundred thirty-one million, two hundred fifty-two thousand, seven hundred forty".