1381115900 has 18 divisors (see below), whose sum is σ = 2997021720. Its totient is φ = 552446320.

The previous prime is 1381115851. The next prime is 1381115959. The reversal of 1381115900 is 95111831.

It is a super-2 number, since 2×1381115900² = 3814962258465620000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6905480 + ... + 6905679.

Almost surely, 2^1381115900 is an apocalyptic number.

1381115900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381115900 is an abundant number, since it is smaller than the sum of its proper divisors (1615905820).

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

1381115900 is a wasteful number, since it uses less digits than its factorization.

1381115900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13811173 (or 13811166 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 29.

The square root of 1381115900 is about 37163.3677160722. The cubic root of 1381115900 is about 1113.6362905153.

The spelling of 1381115900 in words is "one billion, three hundred eighty-one million, one hundred fifteen thousand, nine hundred".