381659924 has 12 divisors (see below), whose sum is σ = 672388500. Its totient is φ = 189548928.

The previous prime is 381659909. The next prime is 381659933. The reversal of 381659924 is 429956183.

It can be written as a sum of positive squares in 2 ways, for example, as 26337424 + 355322500 = 5132^2 + 18850^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319589 + ... + 320780.

It is an arithmetic number, because the mean of its divisors is an integer number (56032375).

Almost surely, 2^381659924 is an apocalyptic number.

It is an amenable number.

381659924 is a deficient number, since it is larger than the sum of its proper divisors (290728576).

381659924 is a wasteful number, since it uses less digits than its factorization.

381659924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640522 (or 640520 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 381659924 is about 19536.1184476344. The cubic root of 381659924 is about 725.3687693506.

The spelling of 381659924 in words is "three hundred eighty-one million, six hundred fifty-nine thousand, nine hundred twenty-four".