381916136 has 16 divisors (see below), whose sum is σ = 818391840. Its totient is φ = 163678320.

The previous prime is 381916123. The next prime is 381916231. The reversal of 381916136 is 631619183.

It is a self number, because there is not a number n which added to its sum of digits gives 381916136.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3409910 + ... + 3410021.

It is an arithmetic number, because the mean of its divisors is an integer number (51149490).

Almost surely, 2^381916136 is an apocalyptic number.

It is an amenable number.

381916136 is an abundant number, since it is smaller than the sum of its proper divisors (436475704).

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

381916136 is a wasteful number, since it uses less digits than its factorization.

381916136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819944 (or 6819940 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The square root of 381916136 is about 19542.6747401680. The cubic root of 381916136 is about 725.5310487340.

The spelling of 381916136 in words is "three hundred eighty-one million, nine hundred sixteen thousand, one hundred thirty-six".