1380137920 has 84 divisors (see below), whose sum is σ = 3823060680. Its totient is φ = 473184768.

The previous prime is 1380137917. The next prime is 1380137921. The reversal of 1380137920 is 297310831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380137921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28330 + ... + 59689.

Almost surely, 2^1380137920 is an apocalyptic number.

1380137920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1380137920 is an abundant number, since it is smaller than the sum of its proper divisors (2442922760).

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

1380137920 is an equidigital number, since it uses as much as digits as its factorization.

1380137920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88050 (or 88033 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1380137920 is about 37150.2075364324. The cubic root of 1380137920 is about 1113.3733699811.

The spelling of 1380137920 in words is "one billion, three hundred eighty million, one hundred thirty-seven thousand, nine hundred twenty".