1381376320 has 56 divisors (see below), whose sum is σ = 3432438144. Its totient is φ = 528523776.

The previous prime is 1381376317. The next prime is 1381376329. The reversal of 1381376320 is 236731831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381376329) 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, 86484 + ... + 101203.

Almost surely, 2^1381376320 is an apocalyptic number.

1381376320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381376320 is an abundant number, since it is smaller than the sum of its proper divisors (2051061824).

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

1381376320 is a wasteful number, since it uses less digits than its factorization.

1381376320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187727 (or 187717 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 1381376320 is about 37166.8712699899. The cubic root of 1381376320 is about 1113.7062810055.

The spelling of 1381376320 in words is "one billion, three hundred eighty-one million, three hundred seventy-six thousand, three hundred twenty".