381302018 has 4 divisors (see below), whose sum is σ = 571953030. Its totient is φ = 190651008.

The previous prime is 381302017. The next prime is 381302039. The reversal of 381302018 is 810203183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 371834089 + 9467929 = 19283^2 + 3077^2 .

It is not an unprimeable number, because it can be changed into a prime (381302011) 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 as a sum of consecutive naturals, namely, 95325503 + ... + 95325506.

Almost surely, 2^381302018 is an apocalyptic number.

381302018 is a deficient number, since it is larger than the sum of its proper divisors (190651012).

381302018 is a wasteful number, since it uses less digits than its factorization.

381302018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190651011.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 381302018 is about 19526.9561888175. The cubic root of 381302018 is about 725.1419574581.

The spelling of 381302018 in words is "three hundred eighty-one million, three hundred two thousand, eighteen".