129580280 has 16 divisors (see below), whose sum is σ = 291555720. Its totient is φ = 51832096.

The previous prime is 129580277. The next prime is 129580331. The reversal of 129580280 is 82085921.

It is a self number, because there is not a number n which added to its sum of digits gives 129580280.

It is a congruent number.

It is an unprimeable number.

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, 1619714 + ... + 1619793.

Almost surely, 2^129580280 is an apocalyptic number.

129580280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129580280 is an abundant number, since it is smaller than the sum of its proper divisors (161975440).

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

129580280 is a wasteful number, since it uses less digits than its factorization.

129580280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239518 (or 3239514 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 129580280 is about 11383.3334309419. Note that the first 3 decimals coincide. The cubic root of 129580280 is about 506.0339304529.

The spelling of 129580280 in words is "one hundred twenty-nine million, five hundred eighty thousand, two hundred eighty".