129904722 has 40 divisors (see below), whose sum is σ = 291747456. Its totient is φ = 43202808.

The previous prime is 129904721. The next prime is 129904751. The reversal of 129904722 is 227409921.

It is not an unprimeable number, because it can be changed into a prime (129904721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 117223 + ... + 118325.

Almost surely, 2^129904722 is an apocalyptic number.

129904722 is an abundant number, since it is smaller than the sum of its proper divisors (161842734).

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

129904722 is a wasteful number, since it uses less digits than its factorization.

129904722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 129904722 is about 11397.5752684507. The cubic root of 129904722 is about 506.4559129431.

The spelling of 129904722 in words is "one hundred twenty-nine million, nine hundred four thousand, seven hundred twenty-two".