381858806 has 16 divisors (see below), whose sum is σ = 675732480. Its totient is φ = 158374440.

The previous prime is 381858793. The next prime is 381858823. The reversal of 381858806 is 608858183.

It is a super-2 number, since 2×381858806² = 291632295439491272, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439496 + ... + 440363.

It is an arithmetic number, because the mean of its divisors is an integer number (42233280).

Almost surely, 2^381858806 is an apocalyptic number.

381858806 is a deficient number, since it is larger than the sum of its proper divisors (293873674).

381858806 is a wasteful number, since it uses less digits than its factorization.

381858806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879899.

The product of its (nonzero) digits is 368640, while the sum is 47.

The square root of 381858806 is about 19541.2078951123. The cubic root of 381858806 is about 725.4947434019.

The spelling of 381858806 in words is "three hundred eighty-one million, eight hundred fifty-eight thousand, eight hundred six".