381838402 has 32 divisors (see below), whose sum is σ = 661193280. Its totient is φ = 163558080.

The previous prime is 381838393. The next prime is 381838417. The reversal of 381838402 is 204838183.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 80028 + ... + 84664.

It is an arithmetic number, because the mean of its divisors is an integer number (20662290).

Almost surely, 2^381838402 is an apocalyptic number.

381838402 is a deficient number, since it is larger than the sum of its proper divisors (279354878).

381838402 is a wasteful number, since it uses less digits than its factorization.

381838402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4866.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 381838402 is about 19540.6858119156. The cubic root of 381838402 is about 725.4818212972.

The spelling of 381838402 in words is "three hundred eighty-one million, eight hundred thirty-eight thousand, four hundred two".