9967878 has 24 divisors (see below), whose sum is σ = 22537008. Its totient is φ = 3178032.

The previous prime is 9967823. The next prime is 9967883. The reversal of 9967878 is 8787699.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11625 + ... + 12452.

It is an arithmetic number, because the mean of its divisors is an integer number (939042).

Almost surely, 2^9967878 is an apocalyptic number.

9967878 is an abundant number, since it is smaller than the sum of its proper divisors (12569130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9967878 is a wasteful number, since it uses less digits than its factorization.

9967878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24108 (or 24105 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 9967878 is about 3157.1946408164. The cubic root of 9967878 is about 215.2125390583.

The spelling of 9967878 in words is "nine million, nine hundred sixty-seven thousand, eight hundred seventy-eight".