9990868 has 12 divisors (see below), whose sum is σ = 17523072. Its totient is φ = 4984280.

The previous prime is 9990863. The next prime is 9990887. The reversal of 9990868 is 8680999.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580 + ... + 4507.

It is an arithmetic number, because the mean of its divisors is an integer number (1460256).

Almost surely, 2^9990868 is an apocalyptic number.

It is an amenable number.

9990868 is a deficient number, since it is larger than the sum of its proper divisors (7532204).

9990868 is a wasteful number, since it uses less digits than its factorization.

9990868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5582 (or 5580 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 9990868 is about 3160.8334343967. The cubic root of 9990868 is about 215.3778680382.

The spelling of 9990868 in words is "nine million, nine hundred ninety thousand, eight hundred sixty-eight".