381189638 has 4 divisors (see below), whose sum is σ = 571784460. Its totient is φ = 190594818.

The previous prime is 381189617. The next prime is 381189643. The reversal of 381189638 is 836981183.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 381189592 and 381189601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95297408 + ... + 95297411.

It is an arithmetic number, because the mean of its divisors is an integer number (142946115).

Almost surely, 2^381189638 is an apocalyptic number.

381189638 is a deficient number, since it is larger than the sum of its proper divisors (190594822).

381189638 is a wasteful number, since it uses less digits than its factorization.

381189638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190594821.

The product of its digits is 248832, while the sum is 47.

The square root of 381189638 is about 19524.0784161507. The cubic root of 381189638 is about 725.0707108202.

The spelling of 381189638 in words is "three hundred eighty-one million, one hundred eighty-nine thousand, six hundred thirty-eight".