381190816 has 24 divisors (see below), whose sum is σ = 760754484. Its totient is φ = 187983360.

The previous prime is 381190811. The next prime is 381190837. The reversal of 381190816 is 618091183.

It can be written as a sum of positive squares in 2 ways, for example, as 354192400 + 26998416 = 18820^2 + 5196^2 .

It is not an unprimeable number, because it can be changed into a prime (381190811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79255 + ... + 83926.

Almost surely, 2^381190816 is an apocalyptic number.

It is an amenable number.

381190816 is a deficient number, since it is larger than the sum of its proper divisors (379563668).

381190816 is a wasteful number, since it uses less digits than its factorization.

381190816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163264 (or 163256 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 381190816 is about 19524.1085840045. The cubic root of 381190816 is about 725.0714577209.

The spelling of 381190816 in words is "three hundred eighty-one million, one hundred ninety thousand, eight hundred sixteen".