7878216 has 32 divisors (see below), whose sum is σ = 20332800. Its totient is φ = 2541120.

The previous prime is 7878197. The next prime is 7878229. The reversal of 7878216 is 6128787.

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, 4551 + ... + 6038.

It is an arithmetic number, because the mean of its divisors is an integer number (635400).

Almost surely, 2^7878216 is an apocalyptic number.

It is an amenable number.

7878216 is an abundant number, since it is smaller than the sum of its proper divisors (12454584).

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

7878216 is a wasteful number, since it uses less digits than its factorization.

7878216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10629 (or 10625 counting only the distinct ones).

The product of its digits is 37632, while the sum is 39.

The square root of 7878216 is about 2806.8159896937. The cubic root of 7878216 is about 198.9799395618.

The spelling of 7878216 in words is "seven million, eight hundred seventy-eight thousand, two hundred sixteen".