129983860 has 12 divisors (see below), whose sum is σ = 272966148. Its totient is φ = 51993536.

The previous prime is 129983857. The next prime is 129983891. The reversal of 129983860 is 68389921.

It can be written as a sum of positive squares in 2 ways, for example, as 100520676 + 29463184 = 10026^2 + 5428^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 129983860.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3249577 + ... + 3249616.

It is an arithmetic number, because the mean of its divisors is an integer number (22747179).

Almost surely, 2^129983860 is an apocalyptic number.

129983860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129983860 is an abundant number, since it is smaller than the sum of its proper divisors (142982288).

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

129983860 is a wasteful number, since it uses less digits than its factorization.

129983860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499202 (or 6499200 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 129983860 is about 11401.0464431999. The cubic root of 129983860 is about 506.5587364363.

The spelling of 129983860 in words is "one hundred twenty-nine million, nine hundred eighty-three thousand, eight hundred sixty".