7878404 has 12 divisors (see below), whose sum is σ = 13924428. Its totient is φ = 3900000.

The previous prime is 7878391. The next prime is 7878413. The reversal of 7878404 is 4048787.

It can be written as a sum of positive squares in 2 ways, for example, as 6240004 + 1638400 = 2498^2 + 1280^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9347 + ... + 10154.

It is an arithmetic number, because the mean of its divisors is an integer number (1160369).

Almost surely, 2^7878404 is an apocalyptic number.

It is an amenable number.

7878404 is a deficient number, since it is larger than the sum of its proper divisors (6046024).

7878404 is a wasteful number, since it uses less digits than its factorization.

7878404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19606 (or 19604 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 7878404 is about 2806.8494793986. The cubic root of 7878404 is about 198.9815223199.

The spelling of 7878404 in words is "seven million, eight hundred seventy-eight thousand, four hundred four".