331020240 has 40 divisors (see below), whose sum is σ = 1026163488. Its totient is φ = 88272000.

The previous prime is 331020233. The next prime is 331020257. The reversal of 331020240 is 42020133.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689386 + ... + 689865.

Almost surely, 2^331020240 is an apocalyptic number.

331020240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331020240 is an abundant number, since it is smaller than the sum of its proper divisors (695143248).

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

331020240 is a wasteful number, since it uses less digits than its factorization.

331020240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379267 (or 1379261 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 331020240 is about 18193.9616356636. The cubic root of 331020240 is about 691.7537408804.

Adding to 331020240 its reverse (42020133), we get a palindrome (373040373).

The spelling of 331020240 in words is "three hundred thirty-one million, twenty thousand, two hundred forty".