381122788 has 24 divisors (see below), whose sum is σ = 709103808. Its totient is φ = 178834656.

The previous prime is 381122783. The next prime is 381122789. The reversal of 381122788 is 887221183.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 381122788.

It is not an unprimeable number, because it can be changed into a prime (381122783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34206 + ... + 43957.

It is an arithmetic number, because the mean of its divisors is an integer number (29545992).

Almost surely, 2^381122788 is an apocalyptic number.

It is an amenable number.

381122788 is a deficient number, since it is larger than the sum of its proper divisors (327981020).

381122788 is a wasteful number, since it uses less digits than its factorization.

381122788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78243 (or 78241 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 381122788 is about 19522.3663524686. The cubic root of 381122788 is about 725.0283226351.

The spelling of 381122788 in words is "three hundred eighty-one million, one hundred twenty-two thousand, seven hundred eighty-eight".