9978146 has 16 divisors (see below), whose sum is σ = 15665400. Its totient is φ = 4760448.

The previous prime is 9978131. The next prime is 9978169. The reversal of 9978146 is 6418799.

It can be written as a sum of positive squares in 4 ways, for example, as 8059921 + 1918225 = 2839^2 + 1385^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9978097 and 9978106.

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, 4196 + ... + 6128.

Almost surely, 2^9978146 is an apocalyptic number.

9978146 is a deficient number, since it is larger than the sum of its proper divisors (5687254).

9978146 is a wasteful number, since it uses less digits than its factorization.

9978146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053.

The product of its digits is 108864, while the sum is 44.

The square root of 9978146 is about 3158.8203494343. The cubic root of 9978146 is about 215.2864111504.

The spelling of 9978146 in words is "nine million, nine hundred seventy-eight thousand, one hundred forty-six".