129084228 has 162 divisors, whose sum is σ = 411961914. Its totient is φ = 33965568.

The previous prime is 129084209. The next prime is 129084251. The reversal of 129084228 is 822480921.

It can be written as a sum of positive squares in 3 ways, for example, as 6140484 + 122943744 = 2478^2 + 11088^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 129084192 and 129084201.

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, 297900 + ... + 298332.

Almost surely, 2^129084228 is an apocalyptic number.

129084228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129084228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205980957).

129084228 is an abundant number, since it is smaller than the sum of its proper divisors (282877686).

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

129084228 is a wasteful number, since it uses less digits than its factorization.

129084228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 129084228 is about 11361.5240174899. The cubic root of 129084228 is about 505.3873810995.

The spelling of 129084228 in words is "one hundred twenty-nine million, eighty-four thousand, two hundred twenty-eight".