391264 has 12 divisors (see below), whose sum is σ = 770364. Its totient is φ = 195616.

The previous prime is 391249. The next prime is 391273. The reversal of 391264 is 462193.

It is a congruent number.

It is an unprimeable number.

391264 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082 + ... + 6145.

It is an arithmetic number, because the mean of its divisors is an integer number (64197).

2³⁹¹²⁶⁴ is an apocalyptic number.

It is an amenable number.

391264 is a deficient number, since it is larger than the sum of its proper divisors (379100).

391264 is a wasteful number, since it uses less digits than its factorization.

391264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12237 (or 12229 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 391264 is about 625.5109911105. The cubic root of 391264 is about 73.1402819499.

The spelling of 391264 in words is "three hundred ninety-one thousand, two hundred sixty-four".