129948850 has 72 divisors (see below), whose sum is σ = 268459380. Its totient is φ = 46794880.

The previous prime is 129948823. The next prime is 129948851. The reversal of 129948850 is 58849921.

It can be written as a sum of positive squares in 6 ways, for example, as 53158681 + 76790169 = 7291^2 + 8763^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 129948850.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129948851) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5649939 + ... + 5649961.

Almost surely, 2^129948850 is an apocalyptic number.

129948850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129948850 is an abundant number, since it is smaller than the sum of its proper divisors (138510530).

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

129948850 is an equidigital number, since it uses as much as digits as its factorization.

129948850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 129948850 is about 11399.5109544226. The cubic root of 129948850 is about 506.5132533180.

The spelling of 129948850 in words is "one hundred twenty-nine million, nine hundred forty-eight thousand, eight hundred fifty".