129313228 has 24 divisors (see below), whose sum is σ = 247351104. Its totient is φ = 58664400.

The previous prime is 129313211. The next prime is 129313231. The reversal of 129313228 is 822313921.

It is a self number, because there is not a number n which added to its sum of digits gives 129313228.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22551 + ... + 27697.

It is an arithmetic number, because the mean of its divisors is an integer number (10306296).

Almost surely, 2^129313228 is an apocalyptic number.

It is an amenable number.

129313228 is a deficient number, since it is larger than the sum of its proper divisors (118037876).

129313228 is a wasteful number, since it uses less digits than its factorization.

129313228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5733 (or 5731 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 129313228 is about 11371.5974251642. The cubic root of 129313228 is about 505.6860629263.

The spelling of 129313228 in words is "one hundred twenty-nine million, three hundred thirteen thousand, two hundred twenty-eight".