381870858 has 64 divisors (see below), whose sum is σ = 806769792. Its totient is φ = 120372480.

The previous prime is 381870857. The next prime is 381870859. The reversal of 381870858 is 858078183.

It is an interprime number because it is at equal distance from previous prime (381870857) and next prime (381870859).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381870857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2207260 + ... + 2207432.

It is an arithmetic number, because the mean of its divisors is an integer number (12605778).

Almost surely, 2^381870858 is an apocalyptic number.

381870858 is an abundant number, since it is smaller than the sum of its proper divisors (424898934).

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

381870858 is a wasteful number, since it uses less digits than its factorization.

381870858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 430080, while the sum is 48.

The square root of 381870858 is about 19541.5162666565. The cubic root of 381870858 is about 725.5023758658.

The spelling of 381870858 in words is "three hundred eighty-one million, eight hundred seventy thousand, eight hundred fifty-eight".