391232 has 14 divisors (see below), whose sum is σ = 776478. Its totient is φ = 195584.

The previous prime is 391231. The next prime is 391247. The reversal of 391232 is 232193.

It can be written as a sum of positive squares in only one way, i.e., 341056 + 50176 = 584^2 + 224^2 .

It is not an unprimeable number, because it can be changed into a prime (391231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2993 + ... + 3120.

2³⁹¹²³² is an apocalyptic number.

391232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

391232 is a deficient number, since it is larger than the sum of its proper divisors (385246).

391232 is an equidigital number, since it uses as much as digits as its factorization.

391232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6125 (or 6115 counting only the distinct ones).

The product of its digits is 324, while the sum is 20.

The square root of 391232 is about 625.4854115005. The cubic root of 391232 is about 73.1382879400.

The spelling of 391232 in words is "three hundred ninety-one thousand, two hundred thirty-two".