129198850 has 24 divisors (see below), whose sum is σ = 262157328. Its totient is φ = 46981200.

The previous prime is 129198791. The next prime is 129198851. The reversal of 129198850 is 58891921.

It is a junction number, because it is equal to n+sod(n) for n = 129198797 and 129198806.

It is not an unprimeable number, because it can be changed into a prime (129198851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116904 + ... + 118003.

It is an arithmetic number, because the mean of its divisors is an integer number (10923222).

Almost surely, 2^129198850 is an apocalyptic number.

129198850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129198850 is an abundant number, since it is smaller than the sum of its proper divisors (132958478).

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

129198850 is a wasteful number, since it uses less digits than its factorization.

129198850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234930 (or 234925 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 129198850 is about 11366.5672038659. The cubic root of 129198850 is about 505.5369252528.

The spelling of 129198850 in words is "one hundred twenty-nine million, one hundred ninety-eight thousand, eight hundred fifty".