129544380 has 192 divisors, whose sum is σ = 471905280. Its totient is φ = 28885248.

The previous prime is 129544367. The next prime is 129544397. The reversal of 129544380 is 83445921.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 162142 + ... + 162938.

It is an arithmetic number, because the mean of its divisors is an integer number (2457840).

Almost surely, 2^129544380 is an apocalyptic number.

129544380 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 129544380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235952640).

129544380 is an abundant number, since it is smaller than the sum of its proper divisors (342360900).

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

129544380 is a wasteful number, since it uses less digits than its factorization.

129544380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 129544380 is about 11381.7564549590. The cubic root of 129544380 is about 505.9871941850.

The spelling of 129544380 in words is "one hundred twenty-nine million, five hundred forty-four thousand, three hundred eighty".