391385244 has 12 divisors (see below), whose sum is σ = 913232264. Its totient is φ = 130461744.

The previous prime is 391385233. The next prime is 391385249. The reversal of 391385244 is 442583193.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391385249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16307707 + ... + 16307730.

Almost surely, 2^391385244 is an apocalyptic number.

It is an amenable number.

391385244 is an abundant number, since it is smaller than the sum of its proper divisors (521847020).

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

391385244 is a wasteful number, since it uses less digits than its factorization.

391385244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32615444 (or 32615442 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 391385244 is about 19783.4588482399. The cubic root of 391385244 is about 731.4783601783.

The spelling of 391385244 in words is "three hundred ninety-one million, three hundred eighty-five thousand, two hundred forty-four".