381243870 has 96 divisors (see below), whose sum is σ = 1199510208. Its totient is φ = 82013184.

The previous prime is 381243857. The next prime is 381243881. The reversal of 381243870 is 78342183.

381243870 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 47 ways as a sum of consecutive naturals, for example, 7089 + ... + 28508.

It is an arithmetic number, because the mean of its divisors is an integer number (12494898).

Almost surely, 2^381243870 is an apocalyptic number.

381243870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381243870 is an abundant number, since it is smaller than the sum of its proper divisors (818266338).

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

381243870 is a wasteful number, since it uses less digits than its factorization.

381243870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35634 (or 35631 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 381243870 is about 19525.4672159209. The cubic root of 381243870 is about 725.1050945549.

The spelling of 381243870 in words is "three hundred eighty-one million, two hundred forty-three thousand, eight hundred seventy".