381317888 has 72 divisors (see below), whose sum is σ = 921124512. Its totient is φ = 153796608.

The previous prime is 381317873. The next prime is 381317891. The reversal of 381317888 is 888713183.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24206 + ... + 36722.

It is an arithmetic number, because the mean of its divisors is an integer number (12793396).

Almost surely, 2^381317888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381317888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (460562256).

381317888 is an abundant number, since it is smaller than the sum of its proper divisors (539806624).

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

381317888 is a wasteful number, since it uses less digits than its factorization.

381317888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12557 (or 12543 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 381317888 is about 19527.3625459251. The cubic root of 381317888 is about 725.1520175877.

The spelling of 381317888 in words is "three hundred eighty-one million, three hundred seventeen thousand, eight hundred eighty-eight".