1381117392 has 50 divisors (see below), whose sum is σ = 3997358178. Its totient is φ = 460372032.

The previous prime is 1381117357. The next prime is 1381117393. The reversal of 1381117392 is 2937111831.

It can be written as a sum of positive squares in only one way, i.e., 1123322256 + 257795136 = 33516^2 + 16056^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381117393) 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 9 ways as a sum of consecutive naturals, for example, 531543 + ... + 534134.

Almost surely, 2^1381117392 is an apocalyptic number.

1381117392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381117392 is an abundant number, since it is smaller than the sum of its proper divisors (2616240786).

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

1381117392 is a wasteful number, since it uses less digits than its factorization.

1381117392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065697 (or 1065682 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 1381117392 is about 37163.3877895974. The cubic root of 1381117392 is about 1113.6366915304.

The spelling of 1381117392 in words is "one billion, three hundred eighty-one million, one hundred seventeen thousand, three hundred ninety-two".