1380944816 has 40 divisors (see below), whose sum is σ = 2836586304. Its totient is φ = 649026560.

The previous prime is 1380944813. The next prime is 1380944819. The reversal of 1380944816 is 6184490831.

It is an interprime number because it is at equal distance from previous prime (1380944813) and next prime (1380944819).

It is not an unprimeable number, because it can be changed into a prime (1380944813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245006 + ... + 250578.

Almost surely, 2^1380944816 is an apocalyptic number.

1380944816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1380944816 is an abundant number, since it is smaller than the sum of its proper divisors (1455641488).

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

1380944816 is a wasteful number, since it uses less digits than its factorization.

1380944816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509 (or 6503 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 1380944816 is about 37161.0658620013. The cubic root of 1380944816 is about 1113.5903051835.

The spelling of 1380944816 in words is "one billion, three hundred eighty million, nine hundred forty-four thousand, eight hundred sixteen".