7978893982 has 32 divisors (see below), whose sum is σ = 12941153280. Its totient is φ = 3679996320.

The previous prime is 7978893973. The next prime is 7978894003. The reversal of 7978893982 is 2893988797.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130732 + ... + 181792.

It is an arithmetic number, because the mean of its divisors is an integer number (404411040).

Almost surely, 2^7978893982 is an apocalyptic number.

7978893982 is a deficient number, since it is larger than the sum of its proper divisors (4962259298).

7978893982 is a wasteful number, since it uses less digits than its factorization.

7978893982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51208.

The product of its digits is 109734912, while the sum is 70.

The square root of 7978893982 is about 89324.6549503551. The cubic root of 7978893982 is about 1998.2396161456.

The spelling of 7978893982 in words is "seven billion, nine hundred seventy-eight million, eight hundred ninety-three thousand, nine hundred eighty-two".