9900450 has 108 divisors (see below), whose sum is σ = 31010850. Its totient is φ = 2257920.

The previous prime is 9900437. The next prime is 9900461. The reversal of 9900450 is 540099.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7800849 + 2099601 = 2793^2 + 1449^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 21826 + ... + 22274.

Almost surely, 2^9900450 is an apocalyptic number.

9900450 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9900450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15505425).

9900450 is an abundant number, since it is smaller than the sum of its proper divisors (21110400).

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

9900450 is a wasteful number, since it uses less digits than its factorization.

9900450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 9900450 is about 3146.4980533921. The cubic root of 9900450 is about 214.7261702301.

The spelling of 9900450 in words is "nine million, nine hundred thousand, four hundred fifty".