129226868 has 12 divisors (see below), whose sum is σ = 231406560. Its totient is φ = 63110712.

The previous prime is 129226861. The next prime is 129226873. The reversal of 129226868 is 868622921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129226861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375488 + ... + 375831.

It is an arithmetic number, because the mean of its divisors is an integer number (19283880).

Almost surely, 2^129226868 is an apocalyptic number.

It is an amenable number.

129226868 is a deficient number, since it is larger than the sum of its proper divisors (102179692).

129226868 is a wasteful number, since it uses less digits than its factorization.

129226868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751366 (or 751364 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 129226868 is about 11367.7996111825. The cubic root of 129226868 is about 505.5734661091.

The spelling of 129226868 in words is "one hundred twenty-nine million, two hundred twenty-six thousand, eight hundred sixty-eight".