129243768 has 32 divisors (see below), whose sum is σ = 324292560. Its totient is φ = 42923520.

The previous prime is 129243727. The next prime is 129243773. The reversal of 129243768 is 867342921.

It is a congruent number.

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, 3073 + ... + 16368.

Almost surely, 2^129243768 is an apocalyptic number.

It is an amenable number.

129243768 is an abundant number, since it is smaller than the sum of its proper divisors (195048792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129243768 is a wasteful number, since it uses less digits than its factorization.

129243768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19727 (or 19723 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 129243768 is about 11368.5429145515. The cubic root of 129243768 is about 505.5955044031.

The spelling of 129243768 in words is "one hundred twenty-nine million, two hundred forty-three thousand, seven hundred sixty-eight".