8663890 has 8 divisors (see below), whose sum is σ = 15595020. Its totient is φ = 3465552.

The previous prime is 8663869. The next prime is 8663899. The reversal of 8663890 is 983668.

It can be written as a sum of positive squares in 2 ways, for example, as 7800849 + 863041 = 2793^2 + 929^2 .

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

It is not an unprimeable number, because it can be changed into a prime (8663899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433185 + ... + 433204.

Almost surely, 2^8663890 is an apocalyptic number.

8663890 is a deficient number, since it is larger than the sum of its proper divisors (6931130).

8663890 is a wasteful number, since it uses less digits than its factorization.

8663890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866396.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 8663890 is about 2943.4486576124. The cubic root of 8663890 is about 205.3860660603.

The spelling of 8663890 in words is "eight million, six hundred sixty-three thousand, eight hundred ninety".