818978696 has 16 divisors (see below), whose sum is σ = 1535896140. Its totient is φ = 409406400.

The previous prime is 818978669. The next prime is 818978707. The reversal of 818978696 is 696879818.

It can be written as a sum of positive squares in 2 ways, for example, as 801456100 + 17522596 = 28310^2 + 4186^2 .

It is a super-2 number, since 2×818978696² = 1341452209003720832, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 58490 + ... + 71126.

Almost surely, 2^818978696 is an apocalyptic number.

It is an amenable number.

818978696 is a deficient number, since it is larger than the sum of its proper divisors (716917444).

818978696 is a wasteful number, since it uses less digits than its factorization.

818978696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20744 (or 20740 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 62.

The square root of 818978696 is about 28617.8038290851. The cubic root of 818978696 is about 935.6014112411.

The spelling of 818978696 in words is "eight hundred eighteen million, nine hundred seventy-eight thousand, six hundred ninety-six".