129220268 has 6 divisors (see below), whose sum is σ = 226135476. Its totient is φ = 64610132.

The previous prime is 129220261. The next prime is 129220271. The reversal of 129220268 is 862022921.

It is not an unprimeable number, because it can be changed into a prime (129220261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16152530 + ... + 16152537.

It is an arithmetic number, because the mean of its divisors is an integer number (37689246).

Almost surely, 2^129220268 is an apocalyptic number.

It is an amenable number.

129220268 is a deficient number, since it is larger than the sum of its proper divisors (96915208).

129220268 is a wasteful number, since it uses less digits than its factorization.

129220268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32305071 (or 32305069 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 129220268 is about 11367.5093138295. The cubic root of 129220268 is about 505.5648589163.

The spelling of 129220268 in words is "one hundred twenty-nine million, two hundred twenty thousand, two hundred sixty-eight".