9999432 has 48 divisors (see below), whose sum is σ = 28021500. Its totient is φ = 3217536.

The previous prime is 9999419. The next prime is 9999433. The reversal of 9999432 is 2349999.

It can be written as a sum of positive squares in 2 ways, for example, as 9400356 + 599076 = 3066^2 + 774^2 .

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9999433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307 + ... + 4482.

Almost surely, 2^9999432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14010750).

9999432 is an abundant number, since it is smaller than the sum of its proper divisors (18022068).

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

9999432 is a wasteful number, since it uses less digits than its factorization.

9999432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830 (or 4823 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 9999432 is about 3162.1878502075. The cubic root of 9999432 is about 215.4393898629.

The spelling of 9999432 in words is "nine million, nine hundred ninety-nine thousand, four hundred thirty-two".