7894743986 has 8 divisors (see below), whose sum is σ = 11845551900. Its totient is φ = 3946226688.

The previous prime is 7894743973. The next prime is 7894744003. The reversal of 7894743986 is 6893474987.

It can be written as a sum of positive squares in 2 ways, for example, as 7888814761 + 5929225 = 88819^2 + 2435^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 564011 + ... + 577838.

Almost surely, 2^7894743986 is an apocalyptic number.

7894743986 is a deficient number, since it is larger than the sum of its proper divisors (3950807914).

7894743986 is a wasteful number, since it uses less digits than its factorization.

7894743986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145308.

The product of its digits is 73156608, while the sum is 65.

The square root of 7894743986 is about 88852.3718647960. The cubic root of 7894743986 is about 1991.1899136743.

The spelling of 7894743986 in words is "seven billion, eight hundred ninety-four million, seven hundred forty-three thousand, nine hundred eighty-six".