9945810 has 48 divisors (see below), whose sum is σ = 29555136. Its totient is φ = 2273184.

The previous prime is 9945781. The next prime is 9945841. The reversal of 9945810 is 185499.

9945810 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 super-2 number, since 2×9945810² = 197838273112200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7264 + ... + 8523.

It is an arithmetic number, because the mean of its divisors is an integer number (615732).

Almost surely, 2^9945810 is an apocalyptic number.

9945810 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9945810 is an abundant number, since it is smaller than the sum of its proper divisors (19609326).

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

9945810 is a wasteful number, since it uses less digits than its factorization.

9945810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15807 (or 15804 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 9945810 is about 3153.6978295328. The cubic root of 9945810 is about 215.0536012021.

The spelling of 9945810 in words is "nine million, nine hundred forty-five thousand, eight hundred ten".