7978324 has 12 divisors (see below), whose sum is σ = 13985748. Its totient is φ = 3982400.

The previous prime is 7978319. The next prime is 7978331. The reversal of 7978324 is 4238797.

It can be written as a sum of positive squares in 2 ways, for example, as 2502724 + 5475600 = 1582^2 + 2340^2 .

It is a d-powerful number, because it can be written as 7² + 9⁷ + 7⁵ + 8⁵ + 3 + 2²¹ + 4¹⁰ .

It is a congruent number.

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, 1734 + ... + 4354.

It is an arithmetic number, because the mean of its divisors is an integer number (1165479).

Almost surely, 2^7978324 is an apocalyptic number.

It is an amenable number.

7978324 is a deficient number, since it is larger than the sum of its proper divisors (6007424).

7978324 is a wasteful number, since it uses less digits than its factorization.

7978324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386 (or 3384 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 7978324 is about 2824.5927140032. The cubic root of 7978324 is about 199.8192032786.

The spelling of 7978324 in words is "seven million, nine hundred seventy-eight thousand, three hundred twenty-four".