8791978 has 8 divisors (see below), whose sum is σ = 14202468. Its totient is φ = 4057824.

The previous prime is 8791933. The next prime is 8791987.

8791978 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 7969329 + 822649 = 2823^2 + 907^2 .

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

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169051 + ... + 169102.

Almost surely, 2^8791978 is an apocalyptic number.

8791978 is a deficient number, since it is larger than the sum of its proper divisors (5410490).

8791978 is a wasteful number, since it uses less digits than its factorization.

8791978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338168.

The product of its digits is 254016, while the sum is 49.

The square root of 8791978 is about 2965.1269787313. The cubic root of 8791978 is about 206.3932695410.

The spelling of 8791978 in words is "eight million, seven hundred ninety-one thousand, nine hundred seventy-eight".