129038805 has 48 divisors (see below), whose sum is σ = 266869440. Its totient is φ = 58986144.

The previous prime is 129038783. The next prime is 129038813. The reversal of 129038805 is 508830921.

It is not a de Polignac number, because 129038805 - 2⁹ = 129038293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129038805.

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 47 ways as a sum of consecutive naturals, for example, 3139 + ... + 16368.

It is an arithmetic number, because the mean of its divisors is an integer number (5559780).

Almost surely, 2^129038805 is an apocalyptic number.

129038805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129038805 is an abundant number, since it is smaller than the sum of its proper divisors (137830635).

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

129038805 is a wasteful number, since it uses less digits than its factorization.

129038805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19535 (or 19522 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 129038805 is about 11359.5248580211. The cubic root of 129038805 is about 505.3280944757.

The spelling of 129038805 in words is "one hundred twenty-nine million, thirty-eight thousand, eight hundred five".