8195978 has 16 divisors (see below), whose sum is σ = 14146944. Its totient is φ = 3488400.

The previous prime is 8195977. The next prime is 8196007. The reversal of 8195978 is 8795918.

It is a happy number.

It is a super-3 number, since 3×8195978³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (8195977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176 + ... + 4052.

It is an arithmetic number, because the mean of its divisors is an integer number (884184).

Almost surely, 2^8195978 is an apocalyptic number.

8195978 is a deficient number, since it is larger than the sum of its proper divisors (5950966).

8195978 is a wasteful number, since it uses less digits than its factorization.

8195978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037.

The product of its digits is 181440, while the sum is 47.

The square root of 8195978 is about 2862.8618548578. The cubic root of 8195978 is about 201.6199926895.

The spelling of 8195978 in words is "eight million, one hundred ninety-five thousand, nine hundred seventy-eight".