381858 has 16 divisors (see below), whose sum is σ = 788736. Its totient is φ = 123120.

The previous prime is 381853. The next prime is 381859. The reversal of 381858 is 858183.

381858 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381858.

It is not an unprimeable number, because it can be changed into a prime (381853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841 + ... + 1212.

It is an arithmetic number, because the mean of its divisors is an integer number (49296).

2³⁸¹⁸⁵⁸ is an apocalyptic number.

381858 is an abundant number, since it is smaller than the sum of its proper divisors (406878).

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

381858 is a wasteful number, since it uses less digits than its factorization.

381858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089.

The product of its digits is 7680, while the sum is 33.

The square root of 381858 is about 617.9465996346. The cubic root of 381858 is about 72.5494232961.

The spelling of 381858 in words is "three hundred eighty-one thousand, eight hundred fifty-eight".