1381490940 has 24 divisors (see below), whose sum is σ = 3868174800. Its totient is φ = 368397568.

The previous prime is 1381490921. The next prime is 1381490947. The reversal of 1381490940 is 490941831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381490947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11512365 + ... + 11512484.

It is an arithmetic number, because the mean of its divisors is an integer number (161173950).

Almost surely, 2^1381490940 is an apocalyptic number.

1381490940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381490940 is an abundant number, since it is smaller than the sum of its proper divisors (2486683860).

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

1381490940 is a wasteful number, since it uses less digits than its factorization.

1381490940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23024861 (or 23024859 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1381490940 is about 37168.4132026106. The cubic root of 1381490940 is about 1113.7370834937.

The spelling of 1381490940 in words is "one billion, three hundred eighty-one million, four hundred ninety thousand, nine hundred forty".