7878416 has 60 divisors (see below), whose sum is σ = 19147212. Its totient is φ = 3112704.

The previous prime is 7878413. The next prime is 7878419. The reversal of 7878416 is 6148787.

It is an interprime number because it is at equal distance from previous prime (7878413) and next prime (7878419).

It can be written as a sum of positive squares in 2 ways, for example, as 802816 + 7075600 = 896^2 + 2660^2 .

It is not an unprimeable number, because it can be changed into a prime (7878413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9806 + ... + 10578.

Almost surely, 2^7878416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7878416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9573606).

7878416 is an abundant number, since it is smaller than the sum of its proper divisors (11268796).

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

7878416 is a wasteful number, since it uses less digits than its factorization.

7878416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 795 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 7878416 is about 2806.8516170257. The cubic root of 7878416 is about 198.9816233462.

The spelling of 7878416 in words is "seven million, eight hundred seventy-eight thousand, four hundred sixteen".