8320978 has 8 divisors (see below), whose sum is σ = 12652668. Its totient is φ = 4103424.

The previous prime is 8320943. The next prime is 8321003. The reversal of 8320978 is 8790238.

It can be written as a sum of positive squares in 2 ways, for example, as 7969329 + 351649 = 2823^2 + 593^2 .

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28351 + ... + 28642.

Almost surely, 2^8320978 is an apocalyptic number.

8320978 is a deficient number, since it is larger than the sum of its proper divisors (4331690).

8320978 is a wasteful number, since it uses less digits than its factorization.

8320978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57068.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 8320978 is about 2884.6105456370. The cubic root of 8320978 is about 202.6398201156.

The spelling of 8320978 in words is "eight million, three hundred twenty thousand, nine hundred seventy-eight".