9986378 has 8 divisors (see below), whose sum is σ = 15860772. Its totient is φ = 4699456.

The previous prime is 9986377. The next prime is 9986407. The reversal of 9986378 is 8736899.

It can be written as a sum of positive squares in 2 ways, for example, as 9653449 + 332929 = 3107^2 + 577^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (9986377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146825 + ... + 146892.

Almost surely, 2^9986378 is an apocalyptic number.

9986378 is a deficient number, since it is larger than the sum of its proper divisors (5874394).

9986378 is a wasteful number, since it uses less digits than its factorization.

9986378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293736.

The product of its digits is 653184, while the sum is 50.

The square root of 9986378 is about 3160.1230988681. The cubic root of 9986378 is about 215.3455988523.

The spelling of 9986378 in words is "nine million, nine hundred eighty-six thousand, three hundred seventy-eight".