129800880 has 240 divisors, whose sum is σ = 493968384. Its totient is φ = 31415040.

The previous prime is 129800833. The next prime is 129800929. The reversal of 129800880 is 88008921.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213537 + ... + 214143.

Almost surely, 2^129800880 is an apocalyptic number.

129800880 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 129800880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246984192).

129800880 is an abundant number, since it is smaller than the sum of its proper divisors (364167504).

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

129800880 is a wasteful number, since it uses less digits than its factorization.

129800880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 129800880 is about 11393.0189151076. The cubic root of 129800880 is about 506.3209283337.

The spelling of 129800880 in words is "one hundred twenty-nine million, eight hundred thousand, eight hundred eighty".