7978396 has 6 divisors (see below), whose sum is σ = 13962200. Its totient is φ = 3989196.

The previous prime is 7978381. The next prime is 7978403. The reversal of 7978396 is 6938797.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997296 + ... + 997303.

Almost surely, 2^7978396 is an apocalyptic number.

It is an amenable number.

7978396 is a deficient number, since it is larger than the sum of its proper divisors (5983804).

7978396 is a wasteful number, since it uses less digits than its factorization.

7978396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994603 (or 1994601 counting only the distinct ones).

The product of its digits is 571536, while the sum is 49.

The square root of 7978396 is about 2824.6054591748. The cubic root of 7978396 is about 199.8198043631.

The spelling of 7978396 in words is "seven million, nine hundred seventy-eight thousand, three hundred ninety-six".