129007770 has 16 divisors (see below), whose sum is σ = 309618720. Its totient is φ = 34402064.

The previous prime is 129007751. The next prime is 129007787. The reversal of 129007770 is 77700921.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2150100 + ... + 2150159.

It is an arithmetic number, because the mean of its divisors is an integer number (19351170).

Almost surely, 2^129007770 is an apocalyptic number.

129007770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129007770 is an abundant number, since it is smaller than the sum of its proper divisors (180610950).

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

129007770 is a wasteful number, since it uses less digits than its factorization.

129007770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300269.

The product of its (nonzero) digits is 6174, while the sum is 33.

The square root of 129007770 is about 11358.1587416271. The cubic root of 129007770 is about 505.2875792347.

The spelling of 129007770 in words is "one hundred twenty-nine million, seven thousand, seven hundred seventy".