129694928 has 20 divisors (see below), whose sum is σ = 274128288. Its totient is φ = 58952160.

The previous prime is 129694897. The next prime is 129694933. The reversal of 129694928 is 829496921.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 368276 + ... + 368627.

Almost surely, 2^129694928 is an apocalyptic number.

It is an amenable number.

129694928 is an abundant number, since it is smaller than the sum of its proper divisors (144433360).

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

129694928 is a wasteful number, since it uses less digits than its factorization.

129694928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736922 (or 736916 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 129694928 is about 11388.3681008299. The cubic root of 129694928 is about 506.1831267050.

The spelling of 129694928 in words is "one hundred twenty-nine million, six hundred ninety-four thousand, nine hundred twenty-eight".