381750218 has 8 divisors (see below), whose sum is σ = 576468900. Its totient is φ = 189593920.

The previous prime is 381750217. The next prime is 381750227. The reversal of 381750218 is 812057183.

It can be written as a sum of positive squares in 2 ways, for example, as 377641489 + 4108729 = 19433^2 + 2027^2 .

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 (381750217) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 640223 + ... + 640818.

Almost surely, 2^381750218 is an apocalyptic number.

381750218 is a deficient number, since it is larger than the sum of its proper divisors (194718682).

381750218 is a wasteful number, since it uses less digits than its factorization.

381750218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281192.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 381750218 is about 19538.4292613301. The cubic root of 381750218 is about 725.4259679884.

The spelling of 381750218 in words is "three hundred eighty-one million, seven hundred fifty thousand, two hundred eighteen".