1868117828 has 12 divisors (see below), whose sum is σ = 3461512572. Its totient is φ = 879114240.

The previous prime is 1868117813. The next prime is 1868117861. The reversal of 1868117828 is 8287118681.

It can be written as a sum of positive squares in 2 ways, for example, as 1401903364 + 466214464 = 37442^2 + 21592^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13736093 + ... + 13736228.

It is an arithmetic number, because the mean of its divisors is an integer number (288459381).

Almost surely, 2^1868117828 is an apocalyptic number.

It is an amenable number.

1868117828 is a deficient number, since it is larger than the sum of its proper divisors (1593394744).

1868117828 is a wasteful number, since it uses less digits than its factorization.

1868117828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27472342 (or 27472340 counting only the distinct ones).

The product of its digits is 344064, while the sum is 50.

The square root of 1868117828 is about 43221.7286558509. The cubic root of 1868117828 is about 1231.5954856608.

The spelling of 1868117828 in words is "one billion, eight hundred sixty-eight million, one hundred seventeen thousand, eight hundred twenty-eight".