129988224 has 96 divisors (see below), whose sum is σ = 381291300. Its totient is φ = 42491904.

The previous prime is 129988223. The next prime is 129988267. The reversal of 129988224 is 422889921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 129960000 + 28224 = 11400^2 + 168^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a self number, because there is not a number n which added to its sum of digits gives 129988224.

It is not an unprimeable number, because it can be changed into a prime (129988223) 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, 59992 + ... + 62120.

Almost surely, 2^129988224 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 129988224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190645650).

129988224 is an abundant number, since it is smaller than the sum of its proper divisors (251303076).

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

129988224 is a wasteful number, since it uses less digits than its factorization.

129988224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2187 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 129988224 is about 11401.2378275343. The cubic root of 129988224 is about 506.5644053390.

The spelling of 129988224 in words is "one hundred twenty-nine million, nine hundred eighty-eight thousand, two hundred twenty-four".