129850560 has 448 divisors, whose sum is σ = 555955200. Its totient is φ = 27869184.

The previous prime is 129850529. The next prime is 129850577. The reversal of 129850560 is 65058921.

It is a happy number.

129850560 is a `hidden beast` number, since 1 + 2 + 98 + 5 + 0 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-2 number, since 2×129850560² = 33722335864627200, which contains 22 as substring.

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, 1149064 + ... + 1149176.

Almost surely, 2^129850560 is an apocalyptic number.

129850560 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 129850560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277977600).

129850560 is an abundant number, since it is smaller than the sum of its proper divisors (426104640).

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

129850560 is a wasteful number, since it uses less digits than its factorization.

129850560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 129850560 is about 11395.1989890480. The cubic root of 129850560 is about 506.3855165328.

The spelling of 129850560 in words is "one hundred twenty-nine million, eight hundred fifty thousand, five hundred sixty".