129928346 has 8 divisors (see below), whose sum is σ = 205150080. Its totient is φ = 61544988.

The previous prime is 129928339. The next prime is 129928369. The reversal of 129928346 is 643829921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129928297 and 129928306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709546 + ... + 1709621.

It is an arithmetic number, because the mean of its divisors is an integer number (25643760).

Almost surely, 2^129928346 is an apocalyptic number.

129928346 is a deficient number, since it is larger than the sum of its proper divisors (75221734).

129928346 is a wasteful number, since it uses less digits than its factorization.

129928346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419188.

The product of its digits is 186624, while the sum is 44.

The square root of 129928346 is about 11398.6115821182. The cubic root of 129928346 is about 506.4866118253.

The spelling of 129928346 in words is "one hundred twenty-nine million, nine hundred twenty-eight thousand, three hundred forty-six".