7978284986 has 32 divisors (see below), whose sum is σ = 13752668160. Its totient is φ = 3400412400.

The previous prime is 7978284949. The next prime is 7978285001. The reversal of 7978284986 is 6894828797.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2498651 + ... + 2501841.

It is an arithmetic number, because the mean of its divisors is an integer number (429770880).

Almost surely, 2^7978284986 is an apocalyptic number.

7978284986 is a deficient number, since it is larger than the sum of its proper divisors (5774383174).

7978284986 is a wasteful number, since it uses less digits than its factorization.

7978284986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130.

The product of its digits is 97542144, while the sum is 68.

The square root of 7978284986 is about 89321.2459944441. The cubic root of 7978284986 is about 1998.1887757285.

The spelling of 7978284986 in words is "seven billion, nine hundred seventy-eight million, two hundred eighty-four thousand, nine hundred eighty-six".