8456978 has 4 divisors (see below), whose sum is σ = 12685470. Its totient is φ = 4228488.

The previous prime is 8456969. The next prime is 8456989. The reversal of 8456978 is 8796548.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7579009 + 877969 = 2753^2 + 937^2 .

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 as a sum of consecutive naturals, namely, 2114243 + ... + 2114246.

Almost surely, 2^8456978 is an apocalyptic number.

8456978 is a deficient number, since it is larger than the sum of its proper divisors (4228492).

8456978 is a wasteful number, since it uses less digits than its factorization.

8456978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228491.

The product of its digits is 483840, while the sum is 47.

The square root of 8456978 is about 2908.0883755484. The cubic root of 8456978 is about 203.7378569300.

The spelling of 8456978 in words is "eight million, four hundred fifty-six thousand, nine hundred seventy-eight".