99439236 has 144 divisors (see below), whose sum is σ = 291695040. Its totient is φ = 28304640.

The previous prime is 99439201. The next prime is 99439237. The reversal of 99439236 is 63293499.

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

It is a junction number, because it is equal to n+sod(n) for n = 99439191 and 99439200.

It is not an unprimeable number, because it can be changed into a prime (99439237) 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 47 ways as a sum of consecutive naturals, for example, 471171 + ... + 471381.

It is an arithmetic number, because the mean of its divisors is an integer number (2025660).

Almost surely, 2^99439236 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 99439236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145847520).

99439236 is an abundant number, since it is smaller than the sum of its proper divisors (192255804).

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

99439236 is a wasteful number, since it uses less digits than its factorization.

99439236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 301 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 99439236 is about 9971.9223823694. The cubic root of 99439236 is about 463.2896445645.

The spelling of 99439236 in words is "ninety-nine million, four hundred thirty-nine thousand, two hundred thirty-six".