1381793280 has 160 divisors (see below), whose sum is σ = 5048676864. Its totient is φ = 315826176.

The previous prime is 1381793251. The next prime is 1381793291. The reversal of 1381793280 is 823971831.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 40909 + ... + 66611.

Almost surely, 2^1381793280 is an apocalyptic number.

1381793280 is a gapful number since it is divisible by the number (10) 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 1381793280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2524338432).

1381793280 is an abundant number, since it is smaller than the sum of its proper divisors (3666883584).

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

1381793280 is an equidigital number, since it uses as much as digits as its factorization.

1381793280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25736 (or 25720 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 1381793280 is about 37172.4801432458. The cubic root of 1381793280 is about 1113.8183248779.

The spelling of 1381793280 in words is "one billion, three hundred eighty-one million, seven hundred ninety-three thousand, two hundred eighty".