391441344 has 112 divisors (see below), whose sum is σ = 1246022400. Its totient is φ = 105947136.

The previous prime is 391441319. The next prime is 391441373. The reversal of 391441344 is 443144193.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17872 + ... + 33200.

It is an arithmetic number, because the mean of its divisors is an integer number (11125200).

Almost surely, 2^391441344 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 391441344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (623011200).

391441344 is an abundant number, since it is smaller than the sum of its proper divisors (854581056).

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

391441344 is a wasteful number, since it uses less digits than its factorization.

391441344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15370 (or 15360 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 391441344 is about 19784.8766485920. The cubic root of 391441344 is about 731.5133078214.

The spelling of 391441344 in words is "three hundred ninety-one million, four hundred forty-one thousand, three hundred forty-four".