9945880 has 32 divisors (see below), whose sum is σ = 25575840. Its totient is φ = 3409920.

The previous prime is 9945877. The next prime is 9945883. The reversal of 9945880 is 885499.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9945877) and next prime (9945883).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17481 + ... + 18040.

It is an arithmetic number, because the mean of its divisors is an integer number (799245).

Almost surely, 2^9945880 is an apocalyptic number.

It is an amenable number.

9945880 is an abundant number, since it is smaller than the sum of its proper divisors (15629960).

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

9945880 is a wasteful number, since it uses less digits than its factorization.

9945880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35539 (or 35535 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 9945880 is about 3153.7089275962. The cubic root of 9945880 is about 215.0541057267.

The spelling of 9945880 in words is "nine million, nine hundred forty-five thousand, eight hundred eighty".