7867878 has 16 divisors (see below), whose sum is σ = 15785280. Its totient is φ = 2614376.

The previous prime is 7867837. The next prime is 7867879. The reversal of 7867878 is 8787687.

7867878 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7867878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7867879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193 + ... + 3971.

It is an arithmetic number, because the mean of its divisors is an integer number (986580).

Almost surely, 2^7867878 is an apocalyptic number.

7867878 is an abundant number, since it is smaller than the sum of its proper divisors (7917402).

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

7867878 is a wasteful number, since it uses less digits than its factorization.

7867878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131.

The product of its digits is 1053696, while the sum is 51.

The square root of 7867878 is about 2804.9737966691. The cubic root of 7867878 is about 198.8928659128.

The spelling of 7867878 in words is "seven million, eight hundred sixty-seven thousand, eight hundred seventy-eight".