381921958 has 32 divisors (see below), whose sum is σ = 641583360. Its totient is φ = 169011360.

The previous prime is 381921941. The next prime is 381921961. The reversal of 381921958 is 859129183.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460288 + ... + 461116.

It is an arithmetic number, because the mean of its divisors is an integer number (20049480).

Almost surely, 2^381921958 is an apocalyptic number.

381921958 is a deficient number, since it is larger than the sum of its proper divisors (259661402).

381921958 is a wasteful number, since it uses less digits than its factorization.

381921958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372.

The product of its digits is 155520, while the sum is 46.

The square root of 381921958 is about 19542.8236956690. The cubic root of 381921958 is about 725.5347354250.

The spelling of 381921958 in words is "three hundred eighty-one million, nine hundred twenty-one thousand, nine hundred fifty-eight".