129744860 has 48 divisors (see below), whose sum is σ = 315356160. Its totient is φ = 43917120.

The previous prime is 129744859. The next prime is 129744907. The reversal of 129744860 is 68447921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5195 + ... + 16925.

It is an arithmetic number, because the mean of its divisors is an integer number (6569920).

Almost surely, 2^129744860 is an apocalyptic number.

129744860 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 129744860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157678080).

129744860 is an abundant number, since it is smaller than the sum of its proper divisors (185611300).

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

129744860 is a wasteful number, since it uses less digits than its factorization.

129744860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11826 (or 11824 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 129744860 is about 11390.5601267014. The cubic root of 129744860 is about 506.2480778264.

The spelling of 129744860 in words is "one hundred twenty-nine million, seven hundred forty-four thousand, eight hundred sixty".