7878678 has 16 divisors (see below), whose sum is σ = 15816816. Its totient is φ = 2616320.

The previous prime is 7878677. The next prime is 7878697. The reversal of 7878678 is 8768787.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7878678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878677) 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, 651 + ... + 4022.

It is an arithmetic number, because the mean of its divisors is an integer number (988551).

Almost surely, 2^7878678 is an apocalyptic number.

7878678 is an abundant number, since it is smaller than the sum of its proper divisors (7938138).

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

7878678 is a wasteful number, since it uses less digits than its factorization.

7878678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4959.

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

The square root of 7878678 is about 2806.8982881465. The cubic root of 7878678 is about 198.9838290606.

The spelling of 7878678 in words is "seven million, eight hundred seventy-eight thousand, six hundred seventy-eight".