8423978 has 16 divisors (see below), whose sum is σ = 13291560. Its totient is φ = 3998400.

The previous prime is 8423953. The next prime is 8423999. The reversal of 8423978 is 8793248.

It can be written as a sum of positive squares in 4 ways, for example, as 2007889 + 6416089 = 1417^2 + 2533^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2348 + ... + 4728.

Almost surely, 2^8423978 is an apocalyptic number.

8423978 is a deficient number, since it is larger than the sum of its proper divisors (4867582).

8423978 is a wasteful number, since it uses less digits than its factorization.

8423978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473.

The product of its digits is 96768, while the sum is 41.

The square root of 8423978 is about 2902.4089994348. The cubic root of 8423978 is about 203.4725094519.

The spelling of 8423978 in words is "eight million, four hundred twenty-three thousand, nine hundred seventy-eight".