331530390 has 24 divisors (see below), whose sum is σ = 861979248. Its totient is φ = 88408080.

The previous prime is 331530377. The next prime is 331530401. The reversal of 331530390 is 93035133.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1841746 + ... + 1841925.

It is an arithmetic number, because the mean of its divisors is an integer number (35915802).

Almost surely, 2^331530390 is an apocalyptic number.

331530390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

331530390 is an abundant number, since it is smaller than the sum of its proper divisors (530448858).

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

331530390 is a wasteful number, since it uses less digits than its factorization.

331530390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683684 (or 3683681 counting only the distinct ones).

The product of its (nonzero) digits is 3645, while the sum is 27.

The square root of 331530390 is about 18207.9759995448. The cubic root of 331530390 is about 692.1089226230.

The spelling of 331530390 in words is "three hundred thirty-one million, five hundred thirty thousand, three hundred ninety".