129227400 has 144 divisors (see below), whose sum is σ = 450231600. Its totient is φ = 34447680.

The previous prime is 129227381. The next prime is 129227407. The reversal of 129227400 is 4722921.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (129227407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47271 + ... + 49929.

Almost surely, 2^129227400 is an apocalyptic number.

129227400 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 129227400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225115800).

129227400 is an abundant number, since it is smaller than the sum of its proper divisors (321004200).

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

129227400 is a wasteful number, since it uses less digits than its factorization.

129227400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690 (or 2669 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 129227400 is about 11367.8230105856. The cubic root of 129227400 is about 505.5741598882.

It can be divided in two parts, 129 and 227400, that added together give a square (227529 = 477²).

The spelling of 129227400 in words is "one hundred twenty-nine million, two hundred twenty-seven thousand, four hundred".