381305868 has 48 divisors (see below), whose sum is σ = 953514240. Its totient is φ = 118286784.

The previous prime is 381305861. The next prime is 381305879. The reversal of 381305868 is 868503183.

It is not an unprimeable number, because it can be changed into a prime (381305861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8458 + ... + 28881.

It is an arithmetic number, because the mean of its divisors is an integer number (19864880).

Almost surely, 2^381305868 is an apocalyptic number.

It is an amenable number.

381305868 is an abundant number, since it is smaller than the sum of its proper divisors (572208372).

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

381305868 is a wasteful number, since it uses less digits than its factorization.

381305868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37406 (or 37404 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 381305868 is about 19527.0547702412. The cubic root of 381305868 is about 725.1443980319.

The spelling of 381305868 in words is "three hundred eighty-one million, three hundred five thousand, eight hundred sixty-eight".