129095850 has 96 divisors (see below), whose sum is σ = 347477760. Its totient is φ = 31530240.

The previous prime is 129095831. The next prime is 129095851. The reversal of 129095850 is 58590921.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129095799 and 129095808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129095851) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 465912 + ... + 466188.

It is an arithmetic number, because the mean of its divisors is an integer number (3619560).

Almost surely, 2^129095850 is an apocalyptic number.

129095850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129095850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173738880).

129095850 is an abundant number, since it is smaller than the sum of its proper divisors (218381910).

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

129095850 is a wasteful number, since it uses less digits than its factorization.

129095850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 129095850 is about 11362.0354690522. The cubic root of 129095850 is about 505.4025480335.

The spelling of 129095850 in words is "one hundred twenty-nine million, ninety-five thousand, eight hundred fifty".