129880306 has 8 divisors (see below), whose sum is σ = 206280540. Its totient is φ = 61120128.

The previous prime is 129880301. The next prime is 129880319. The reversal of 129880306 is 603088921.

It can be written as a sum of positive squares in 2 ways, for example, as 126765081 + 3115225 = 11259^2 + 1765^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (129880301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1909971 + ... + 1910038.

Almost surely, 2^129880306 is an apocalyptic number.

129880306 is a deficient number, since it is larger than the sum of its proper divisors (76400234).

129880306 is a wasteful number, since it uses less digits than its factorization.

129880306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820028.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 129880306 is about 11396.5041131042. The cubic root of 129880306 is about 506.4241809625.

The spelling of 129880306 in words is "one hundred twenty-nine million, eight hundred eighty thousand, three hundred six".