1381916356 has 6 divisors (see below), whose sum is σ = 2418353630. Its totient is φ = 690958176.

The previous prime is 1381916317. The next prime is 1381916363. The reversal of 1381916356 is 6536191831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1182259456 + 199656900 = 34384^2 + 14130^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172739541 + ... + 172739548.

Almost surely, 2^1381916356 is an apocalyptic number.

It is an amenable number.

1381916356 is a deficient number, since it is larger than the sum of its proper divisors (1036437274).

1381916356 is a wasteful number, since it uses less digits than its factorization.

1381916356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345479093 (or 345479091 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 1381916356 is about 37174.1355783830. The cubic root of 1381916356 is about 1113.8513930742.

The spelling of 1381916356 in words is "one billion, three hundred eighty-one million, nine hundred sixteen thousand, three hundred fifty-six".