381773218 has 16 divisors (see below), whose sum is σ = 579705984. Its totient is φ = 188548560.

The previous prime is 381773209. The next prime is 381773219. The reversal of 381773218 is 812377183.

It is not an unprimeable number, because it can be changed into a prime (381773219) 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 7 ways as a sum of consecutive naturals, for example, 76108 + ... + 80968.

It is an arithmetic number, because the mean of its divisors is an integer number (36231624).

Almost surely, 2^381773218 is an apocalyptic number.

381773218 is a deficient number, since it is larger than the sum of its proper divisors (197932766).

381773218 is a wasteful number, since it uses less digits than its factorization.

381773218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5337.

The product of its digits is 56448, while the sum is 40.

The square root of 381773218 is about 19539.0178361145. The cubic root of 381773218 is about 725.4405363819.

The spelling of 381773218 in words is "three hundred eighty-one million, seven hundred seventy-three thousand, two hundred eighteen".