7978126 has 16 divisors (see below), whose sum is σ = 13046544. Its totient is φ = 3636864.

The previous prime is 7978099. The next prime is 7978169. The reversal of 7978126 is 6218797.

It is a congruent number.

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, 310 + ... + 4006.

It is an arithmetic number, because the mean of its divisors is an integer number (815409).

Almost surely, 2^7978126 is an apocalyptic number.

7978126 is a deficient number, since it is larger than the sum of its proper divisors (5068418).

7978126 is a wasteful number, since it uses less digits than its factorization.

7978126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795.

The product of its digits is 42336, while the sum is 40.

The square root of 7978126 is about 2824.5576644848. The cubic root of 7978126 is about 199.8175502778.

The spelling of 7978126 in words is "seven million, nine hundred seventy-eight thousand, one hundred twenty-six".