381906258 has 16 divisors (see below), whose sum is σ = 808742880. Its totient is φ = 119813696.

The previous prime is 381906247. The next prime is 381906281. The reversal of 381906258 is 852609183.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1871988 + ... + 1872191.

It is an arithmetic number, because the mean of its divisors is an integer number (50546430).

Almost surely, 2^381906258 is an apocalyptic number.

381906258 is an abundant number, since it is smaller than the sum of its proper divisors (426836622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381906258 is a wasteful number, since it uses less digits than its factorization.

381906258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744201.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 381906258 is about 19542.4220095668. The cubic root of 381906258 is about 725.5247935584.

The spelling of 381906258 in words is "three hundred eighty-one million, nine hundred six thousand, two hundred fifty-eight".