7978336 has 24 divisors (see below), whose sum is σ = 15780744. Its totient is φ = 3970560.

The previous prime is 7978331. The next prime is 7978337. The reversal of 7978336 is 6338797.

It is a junction number, because it is equal to n+sod(n) for n = 7978292 and 7978301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8616 + ... + 9496.

It is an arithmetic number, because the mean of its divisors is an integer number (657531).

Almost surely, 2^7978336 is an apocalyptic number.

It is an amenable number.

7978336 is a deficient number, since it is larger than the sum of its proper divisors (7802408).

7978336 is a wasteful number, since it uses less digits than its factorization.

7978336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174 (or 1166 counting only the distinct ones).

The product of its digits is 190512, while the sum is 43.

The square root of 7978336 is about 2824.5948382025. The cubic root of 7978336 is about 199.8193034596.

The spelling of 7978336 in words is "seven million, nine hundred seventy-eight thousand, three hundred thirty-six".