129227700 has 216 divisors, whose sum is σ = 445284000. Its totient is φ = 28842240.

The previous prime is 129227699. The next prime is 129227711. The reversal of 129227700 is 7722921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 867226 + ... + 867374.

It is an arithmetic number, because the mean of its divisors is an integer number (2061500).

Almost surely, 2^129227700 is an apocalyptic number.

129227700 is a gapful number since it is divisible by the number (10) 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 129227700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222642000).

129227700 is an abundant number, since it is smaller than the sum of its proper divisors (316056300).

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

129227700 is a wasteful number, since it uses less digits than its factorization.

129227700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 129227700 is about 11367.8362057165. The cubic root of 129227700 is about 505.5745511162.

The spelling of 129227700 in words is "one hundred twenty-nine million, two hundred twenty-seven thousand, seven hundred".