9978306 has 32 divisors (see below), whose sum is σ = 22626240. Its totient is φ = 2908224.

The previous prime is 9978301. The next prime is 9978307. The reversal of 9978306 is 6038799.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1885 + ... + 4848.

It is an arithmetic number, because the mean of its divisors is an integer number (707070).

Almost surely, 2^9978306 is an apocalyptic number.

9978306 is an abundant number, since it is smaller than the sum of its proper divisors (12647934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9978306 is a wasteful number, since it uses less digits than its factorization.

9978306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 9978306 is about 3158.8456752428. The cubic root of 9978306 is about 215.2875618532.

The spelling of 9978306 in words is "nine million, nine hundred seventy-eight thousand, three hundred six".