391272 has 64 divisors (see below), whose sum is σ = 1192320. Its totient is φ = 104448.

The previous prime is 391249. The next prime is 391273. The reversal of 391272 is 272193.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (391273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2788 + ... + 2924.

It is an arithmetic number, because the mean of its divisors is an integer number (18630).

2³⁹¹²⁷² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (596160).

391272 is an abundant number, since it is smaller than the sum of its proper divisors (801048).

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

391272 is a wasteful number, since it uses less digits than its factorization.

391272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 166 counting only the distinct ones).

The product of its digits is 756, while the sum is 24.

The square root of 391272 is about 625.5173858495. The cubic root of 391272 is about 73.1407804354.

The spelling of 391272 in words is "three hundred ninety-one thousand, two hundred seventy-two".