391276 has 12 divisors (see below), whose sum is σ = 714672. Its totient is φ = 187088.

The previous prime is 391273. The next prime is 391283. The reversal of 391276 is 672193.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035 + ... + 2218.

It is an arithmetic number, because the mean of its divisors is an integer number (59556).

2³⁹¹²⁷⁶ is an apocalyptic number.

It is an amenable number.

391276 is a deficient number, since it is larger than the sum of its proper divisors (323396).

391276 is a wasteful number, since it uses less digits than its factorization.

391276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4280 (or 4278 counting only the distinct ones).

The product of its digits is 2268, while the sum is 28.

The square root of 391276 is about 625.5205831945. The cubic root of 391276 is about 73.1410296756.

The spelling of 391276 in words is "three hundred ninety-one thousand, two hundred seventy-six".