129040764 has 96 divisors (see below), whose sum is σ = 327849984. Its totient is φ = 39399360.

The previous prime is 129040757. The next prime is 129040777. The reversal of 129040764 is 467040921.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 984979 + ... + 985109.

It is an arithmetic number, because the mean of its divisors is an integer number (3415104).

Almost surely, 2^129040764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129040764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163924992).

129040764 is an abundant number, since it is smaller than the sum of its proper divisors (198809220).

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

129040764 is a wasteful number, since it uses less digits than its factorization.

129040764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 129040764 is about 11359.6110848919. The cubic root of 129040764 is about 505.3306516722.

The spelling of 129040764 in words is "one hundred twenty-nine million, forty thousand, seven hundred sixty-four".