381612638 has 16 divisors (see below), whose sum is σ = 624826224. Its totient is φ = 173357760.

The previous prime is 381612629. The next prime is 381612731. The reversal of 381612638 is 836216183.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42956 + ... + 51072.

It is an arithmetic number, because the mean of its divisors is an integer number (39051639).

Almost surely, 2^381612638 is an apocalyptic number.

381612638 is a deficient number, since it is larger than the sum of its proper divisors (243213586).

381612638 is a wasteful number, since it uses less digits than its factorization.

381612638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10267.

The product of its digits is 41472, while the sum is 38.

The square root of 381612638 is about 19534.9081902117. The cubic root of 381612638 is about 725.3388114378.

The spelling of 381612638 in words is "three hundred eighty-one million, six hundred twelve thousand, six hundred thirty-eight".