391332 has 12 divisors (see below), whose sum is σ = 913136. Its totient is φ = 130440.

The previous prime is 391331. The next prime is 391337. The reversal of 391332 is 233193.

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

It is a junction number, because it is equal to n+sod(n) for n = 391299 and 391308.

It is not an unprimeable number, because it can be changed into a prime (391331) 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, 16294 + ... + 16317.

2³⁹¹³³² is an apocalyptic number.

It is an amenable number.

391332 is an abundant number, since it is smaller than the sum of its proper divisors (521804).

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

391332 is a wasteful number, since it uses less digits than its factorization.

391332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32618 (or 32616 counting only the distinct ones).

The product of its digits is 486, while the sum is 21.

The square root of 391332 is about 625.5653443087. The cubic root of 391332 is about 73.1445188599.

The spelling of 391332 in words is "three hundred ninety-one thousand, three hundred thirty-two".