381703818 has 16 divisors (see below), whose sum is σ = 763836480. Its totient is φ = 127163136.

The previous prime is 381703811. The next prime is 381703831. The reversal of 381703818 is 818307183.

It is not an unprimeable number, because it can be changed into a prime (381703811) 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, 5655 + ... + 28202.

It is an arithmetic number, because the mean of its divisors is an integer number (47739780).

Almost surely, 2^381703818 is an apocalyptic number.

381703818 is an abundant number, since it is smaller than the sum of its proper divisors (382132662).

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

381703818 is a wasteful number, since it uses less digits than its factorization.

381703818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35741.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 381703818 is about 19537.2418217107. The cubic root of 381703818 is about 725.3965760569.

The spelling of 381703818 in words is "three hundred eighty-one million, seven hundred three thousand, eight hundred eighteen".