9945550 has 48 divisors (see below), whose sum is σ = 20199600. Its totient is φ = 3638880.

The previous prime is 9945539. The next prime is 9945553. The reversal of 9945550 is 555499.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945553) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 342936 + ... + 342964.

It is an arithmetic number, because the mean of its divisors is an integer number (420825).

Almost surely, 2^9945550 is an apocalyptic number.

9945550 is an abundant number, since it is smaller than the sum of its proper divisors (10254050).

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

9945550 is a wasteful number, since it uses less digits than its factorization.

9945550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 9945550 is about 3153.6566078126. The cubic root of 9945550 is about 215.0517272330.

The spelling of 9945550 in words is "nine million, nine hundred forty-five thousand, five hundred fifty".