7878006 has 32 divisors (see below), whose sum is σ = 18270720. Its totient is φ = 2511432.

The previous prime is 7877993. The next prime is 7878007. The reversal of 7878006 is 6008787.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1930 + ... + 4413.

It is an arithmetic number, because the mean of its divisors is an integer number (570960).

Almost surely, 2^7878006 is an apocalyptic number.

7878006 is an abundant number, since it is smaller than the sum of its proper divisors (10392714).

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

7878006 is a wasteful number, since it uses less digits than its factorization.

7878006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6377 (or 6371 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 7878006 is about 2806.7785805083. The cubic root of 7878006 is about 198.9781715575.

The spelling of 7878006 in words is "seven million, eight hundred seventy-eight thousand, six".