1380857344 has 60 divisors (see below), whose sum is σ = 2796828804. Its totient is φ = 681080832.

The previous prime is 1380857333. The next prime is 1380857347. The reversal of 1380857344 is 4437580831.

It is a self number, because there is not a number n which added to its sum of digits gives 1380857344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380857347) 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 5 ways as a sum of consecutive naturals, for example, 6082959 + ... + 6083185.

Almost surely, 2^1380857344 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 1380857344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1398414402).

1380857344 is an abundant number, since it is smaller than the sum of its proper divisors (1415971460).

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

1380857344 is an frugal number, since it uses more digits than its factorization.

1380857344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 1380857344 is about 37159.8889126434. Note that the first 3 decimals coincide. The cubic root of 1380857344 is about 1113.5667922894.

The spelling of 1380857344 in words is "one billion, three hundred eighty million, eight hundred fifty-seven thousand, three hundred forty-four".