381856772 has 24 divisors (see below), whose sum is σ = 737789472. Its totient is φ = 171478400.

The previous prime is 381856751. The next prime is 381856777. The reversal of 381856772 is 277658183.

It is a happy number.

381856772 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (381856777) 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 7 ways as a sum of consecutive naturals, for example, 48629 + ... + 55932.

It is an arithmetic number, because the mean of its divisors is an integer number (30741228).

Almost surely, 2^381856772 is an apocalyptic number.

It is an amenable number.

381856772 is a deficient number, since it is larger than the sum of its proper divisors (355932700).

381856772 is a wasteful number, since it uses less digits than its factorization.

381856772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104659 (or 104657 counting only the distinct ones).

The product of its digits is 564480, while the sum is 47.

The square root of 381856772 is about 19541.1558511773. The cubic root of 381856772 is about 725.4934552653.

The spelling of 381856772 in words is "three hundred eighty-one million, eight hundred fifty-six thousand, seven hundred seventy-two".