331989132 has 12 divisors (see below), whose sum is σ = 774641336. Its totient is φ = 110663040.

The previous prime is 331989083. The next prime is 331989139. The reversal of 331989132 is 231989133.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×331989132² = 220433567532226848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331989139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13832869 + ... + 13832892.

Almost surely, 2^331989132 is an apocalyptic number.

It is an amenable number.

331989132 is an abundant number, since it is smaller than the sum of its proper divisors (442652204).

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

331989132 is a wasteful number, since it uses less digits than its factorization.

331989132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27665768 (or 27665766 counting only the distinct ones).

The product of its digits is 34992, while the sum is 39.

The square root of 331989132 is about 18220.5689263535. The cubic root of 331989132 is about 692.4280015682.

Subtracting from 331989132 its reverse (231989133), we obtain a palindrome (99999999).

The spelling of 331989132 in words is "three hundred thirty-one million, nine hundred eighty-nine thousand, one hundred thirty-two".