129758796 has 36 divisors (see below), whose sum is σ = 331695000. Its totient is φ = 42765888.

The previous prime is 129758791. The next prime is 129758803. The reversal of 129758796 is 697857921.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (129758791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17046 + ... + 23453.

It is an arithmetic number, because the mean of its divisors is an integer number (9213750).

Almost surely, 2^129758796 is an apocalyptic number.

It is an amenable number.

129758796 is an abundant number, since it is smaller than the sum of its proper divisors (201936204).

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

129758796 is a wasteful number, since it uses less digits than its factorization.

129758796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40598 (or 40593 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 129758796 is about 11391.1718448981. The cubic root of 129758796 is about 506.2662026822.

The spelling of 129758796 in words is "one hundred twenty-nine million, seven hundred fifty-eight thousand, seven hundred ninety-six".