129803188 has 12 divisors (see below), whose sum is σ = 234988740. Its totient is φ = 62663552.

The previous prime is 129803183. The next prime is 129803189. The reversal of 129803188 is 881308921.

It can be written as a sum of positive squares in 2 ways, for example, as 32741284 + 97061904 = 5722^2 + 9852^2 .

It is a super-2 number, since 2×129803188² = 33697735229926688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129803188.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129803183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559381 + ... + 559612.

It is an arithmetic number, because the mean of its divisors is an integer number (19582395).

Almost surely, 2^129803188 is an apocalyptic number.

It is an amenable number.

129803188 is a deficient number, since it is larger than the sum of its proper divisors (105185552).

129803188 is a wasteful number, since it uses less digits than its factorization.

129803188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119026 (or 1119024 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 129803188 is about 11393.1202047551. The cubic root of 129803188 is about 506.3239292938.

The spelling of 129803188 in words is "one hundred twenty-nine million, eight hundred three thousand, one hundred eighty-eight".