129227380 has 12 divisors (see below), whose sum is σ = 271377540. Its totient is φ = 51690944.

The previous prime is 129227339. The next prime is 129227381. The reversal of 129227380 is 83722921.

It can be written as a sum of positive squares in 2 ways, for example, as 18472804 + 110754576 = 4298^2 + 10524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129227381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3230665 + ... + 3230704.

It is an arithmetic number, because the mean of its divisors is an integer number (22614795).

Almost surely, 2^129227380 is an apocalyptic number.

129227380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129227380 is an abundant number, since it is smaller than the sum of its proper divisors (142150160).

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

129227380 is a wasteful number, since it uses less digits than its factorization.

129227380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6461378 (or 6461376 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 129227380 is about 11367.8221309097. The cubic root of 129227380 is about 505.5741338063.

It can be divided in two parts, 12922 and 7380, that added together give a palindrome (20302).

The spelling of 129227380 in words is "one hundred twenty-nine million, two hundred twenty-seven thousand, three hundred eighty".