9978366 has 16 divisors (see below), whose sum is σ = 20824704. Its totient is φ = 3181464.

The previous prime is 9978361. The next prime is 9978383. The reversal of 9978366 is 6638799.

It is a happy number.

9978366 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36016 + ... + 36291.

It is an arithmetic number, because the mean of its divisors is an integer number (1301544).

Almost surely, 2^9978366 is an apocalyptic number.

9978366 is an abundant number, since it is smaller than the sum of its proper divisors (10846338).

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

9978366 is a wasteful number, since it uses less digits than its factorization.

9978366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72335.

The product of its digits is 489888, while the sum is 48.

The square root of 9978366 is about 3158.8551723686. The cubic root of 9978366 is about 215.2879933636.

The spelling of 9978366 in words is "nine million, nine hundred seventy-eight thousand, three hundred sixty-six".