381978226 has 24 divisors (see below), whose sum is σ = 670035456. Its totient is φ = 162839880.

The previous prime is 381978217. The next prime is 381978229. The reversal of 381978226 is 622879183.

It is not an unprimeable number, because it can be changed into a prime (381978229) 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 11 ways as a sum of consecutive naturals, for example, 8515 + ... + 28921.

It is an arithmetic number, because the mean of its divisors is an integer number (27918144).

Almost surely, 2^381978226 is an apocalyptic number.

381978226 is a deficient number, since it is larger than the sum of its proper divisors (288057230).

381978226 is a wasteful number, since it uses less digits than its factorization.

381978226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20614 (or 20607 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 381978226 is about 19544.2632503761. The cubic root of 381978226 is about 725.5703643303.

The spelling of 381978226 in words is "three hundred eighty-one million, nine hundred seventy-eight thousand, two hundred twenty-six".