9940656 has 80 divisors (see below), whose sum is σ = 28533888. Its totient is φ = 2956800.

The previous prime is 9940643. The next prime is 9940681. The reversal of 9940656 is 6560499.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35236 + ... + 35516.

Almost surely, 2^9940656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9940656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14266944).

9940656 is an abundant number, since it is smaller than the sum of its proper divisors (18593232).

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

9940656 is a wasteful number, since it uses less digits than its factorization.

9940656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 9940656 is about 3152.8805876531. The cubic root of 9940656 is about 215.0164472725.

It can be divided in two parts, 99 and 40656, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 9940656 in words is "nine million, nine hundred forty thousand, six hundred fifty-six".