381250018 has 8 divisors (see below), whose sum is σ = 572077548. Its totient is φ = 190557504.

The previous prime is 381250013. The next prime is 381250027. The reversal of 381250018 is 810052183.

It can be written as a sum of positive squares in 2 ways, for example, as 368908849 + 12341169 = 19207^2 + 3513^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (381250013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26371 + ... + 38182.

Almost surely, 2^381250018 is an apocalyptic number.

381250018 is a deficient number, since it is larger than the sum of its proper divisors (190827530).

381250018 is a wasteful number, since it uses less digits than its factorization.

381250018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67508.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 381250018 is about 19525.6246506994. The cubic root of 381250018 is about 725.1089922544.

The spelling of 381250018 in words is "three hundred eighty-one million, two hundred fifty thousand, eighteen".