129928294 has 16 divisors (see below), whose sum is σ = 202644000. Its totient is φ = 62403264.

The previous prime is 129928291. The next prime is 129928301. The reversal of 129928294 is 492829921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129928291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5914 + ... + 17170.

It is an arithmetic number, because the mean of its divisors is an integer number (12665250).

Almost surely, 2^129928294 is an apocalyptic number.

129928294 is a deficient number, since it is larger than the sum of its proper divisors (72715706).

129928294 is a wasteful number, since it uses less digits than its factorization.

129928294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11487.

The product of its digits is 186624, while the sum is 46.

The square root of 129928294 is about 11398.6093011385. The cubic root of 129928294 is about 506.4865442565.

The spelling of 129928294 in words is "one hundred twenty-nine million, nine hundred twenty-eight thousand, two hundred ninety-four".