8663990 has 8 divisors (see below), whose sum is σ = 15595200. Its totient is φ = 3465592.

The previous prime is 8663987. The next prime is 8664023. The reversal of 8663990 is 993668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 433190 + ... + 433209.

It is an arithmetic number, because the mean of its divisors is an integer number (1949400).

Almost surely, 2^8663990 is an apocalyptic number.

8663990 is a deficient number, since it is larger than the sum of its proper divisors (6931210).

8663990 is a wasteful number, since it uses less digits than its factorization.

8663990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866406.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 8663990 is about 2943.4656444402. The cubic root of 8663990 is about 205.3868562568.

The spelling of 8663990 in words is "eight million, six hundred sixty-three thousand, nine hundred ninety".