9999450 has 72 divisors (see below), whose sum is σ = 27894048. Its totient is φ = 2663280.

The previous prime is 9999433. The next prime is 9999463. The reversal of 9999450 is 549999.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 9999396 and 9999405.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11739 + ... + 12561.

Almost surely, 2^9999450 is an apocalyptic number.

9999450 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 9999450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13947024).

9999450 is an abundant number, since it is smaller than the sum of its proper divisors (17894598).

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

9999450 is a wasteful number, since it uses less digits than its factorization.

9999450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 9999450 is about 3162.1906963370. The cubic root of 9999450 is about 215.4395191338.

The spelling of 9999450 in words is "nine million, nine hundred ninety-nine thousand, four hundred fifty".