1831397344 has 72 divisors (see below), whose sum is σ = 4211122608. Its totient is φ = 781724160.

The previous prime is 1831397279. The next prime is 1831397377. The reversal of 1831397344 is 4437931381.

It is a super-2 number, since 2×1831397344² = 6708032463220508672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1831397344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 410164 + ... + 414604.

It is an arithmetic number, because the mean of its divisors is an integer number (58487814).

Almost surely, 2^1831397344 is an apocalyptic number.

1831397344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1831397344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2105561304).

1831397344 is an abundant number, since it is smaller than the sum of its proper divisors (2379725264).

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

1831397344 is a wasteful number, since it uses less digits than its factorization.

1831397344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4728 (or 4713 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 1831397344 is about 42794.8284726087. The cubic root of 1831397344 is about 1223.4724469810.

The spelling of 1831397344 in words is "one billion, eight hundred thirty-one million, three hundred ninety-seven thousand, three hundred forty-four".