1381075940 has 48 divisors (see below), whose sum is σ = 3030072192. Its totient is φ = 527763456.

The previous prime is 1381075931. The next prime is 1381075951. The reversal of 1381075940 is 495701831.

It is a junction number, because it is equal to n+sod(n) for n = 1381075894 and 1381075903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558587 + ... + 561053.

It is an arithmetic number, because the mean of its divisors is an integer number (63126504).

Almost surely, 2^1381075940 is an apocalyptic number.

1381075940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381075940 is an abundant number, since it is smaller than the sum of its proper divisors (1648996252).

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

1381075940 is a wasteful number, since it uses less digits than its factorization.

1381075940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3716 (or 3714 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1381075940 is about 37162.8300859878. The cubic root of 1381075940 is about 1113.6255500855.

The spelling of 1381075940 in words is "one billion, three hundred eighty-one million, seventy-five thousand, nine hundred forty".