7978370 has 16 divisors (see below), whose sum is σ = 14412600. Its totient is φ = 3179904.

The previous prime is 7978367. The next prime is 7978379. The reversal of 7978370 is 738797.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5707321 + 2271049 = 2389^2 + 1507^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7978379) 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 7 ways as a sum of consecutive naturals, for example, 1856 + ... + 4404.

Almost surely, 2^7978370 is an apocalyptic number.

7978370 is a deficient number, since it is larger than the sum of its proper divisors (6434230).

7978370 is a wasteful number, since it uses less digits than its factorization.

7978370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 7978370 is about 2824.6008567583. The cubic root of 7978370 is about 199.8195873052.

The spelling of 7978370 in words is "seven million, nine hundred seventy-eight thousand, three hundred seventy".