391044 has 12 divisors (see below), whose sum is σ = 912464. Its totient is φ = 130344.

The previous prime is 391031. The next prime is 391049. The reversal of 391044 is 440193.

391044 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 391044.

It is not an unprimeable number, because it can be changed into a prime (391049) 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, 16282 + ... + 16305.

2³⁹¹⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

391044 is an abundant number, since it is smaller than the sum of its proper divisors (521420).

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

391044 is a wasteful number, since it uses less digits than its factorization.

391044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32594 (or 32592 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 391044 is about 625.3351101609. The cubic root of 391044 is about 73.1265709356.

The spelling of 391044 in words is "three hundred ninety-one thousand, forty-four".