381843656 has 32 divisors (see below), whose sum is σ = 727056000. Its totient is φ = 187976256.

The previous prime is 381843599. The next prime is 381843659. The reversal of 381843656 is 656348183.

It is not an unprimeable number, because it can be changed into a prime (381843659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321095 + ... + 322281.

It is an arithmetic number, because the mean of its divisors is an integer number (22720500).

Almost surely, 2^381843656 is an apocalyptic number.

It is an amenable number.

381843656 is a deficient number, since it is larger than the sum of its proper divisors (345212344).

381843656 is a wasteful number, since it uses less digits than its factorization.

381843656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1777 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The square root of 381843656 is about 19540.8202489046. The cubic root of 381843656 is about 725.4851487642.

It can be divided in two parts, 3818 and 43656, that added together give a palindrome (47474).

The spelling of 381843656 in words is "three hundred eighty-one million, eight hundred forty-three thousand, six hundred fifty-six".