9878986 has 16 divisors (see below), whose sum is σ = 16014600. Its totient is φ = 4543488.

The previous prime is 9878929. The next prime is 9879007. The reversal of 9878986 is 6898789.

It can be written as a sum of positive squares in 4 ways, for example, as 6095961 + 3783025 = 2469^2 + 1945^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10170 + ... + 11098.

Almost surely, 2^9878986 is an apocalyptic number.

9878986 is a deficient number, since it is larger than the sum of its proper divisors (6135614).

9878986 is a wasteful number, since it uses less digits than its factorization.

9878986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353.

The product of its digits is 1741824, while the sum is 55.

The square root of 9878986 is about 3143.0854267741. The cubic root of 9878986 is about 214.5708837804.

The spelling of 9878986 in words is "nine million, eight hundred seventy-eight thousand, nine hundred eighty-six".