7878004 has 12 divisors (see below), whose sum is σ = 14597604. Its totient is φ = 3707264.

The previous prime is 7877993. The next prime is 7878007. The reversal of 7878004 is 4008787.

It can be written as a sum of positive squares in 2 ways, for example, as 4418404 + 3459600 = 2102^2 + 1860^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57859 + ... + 57994.

It is an arithmetic number, because the mean of its divisors is an integer number (1216467).

Almost surely, 2^7878004 is an apocalyptic number.

It is an amenable number.

7878004 is a deficient number, since it is larger than the sum of its proper divisors (6719600).

7878004 is a wasteful number, since it uses less digits than its factorization.

7878004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115874 (or 115872 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 7878004 is about 2806.7782242279. The cubic root of 7878004 is about 198.9781547193.

The spelling of 7878004 in words is "seven million, eight hundred seventy-eight thousand, four".