129957888 has 68 divisors (see below), whose sum is σ = 347076008. Its totient is φ = 43253760.

The previous prime is 129957871. The next prime is 129957917. The reversal of 129957888 is 888759921.

It is a congruent number.

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, 196278 + ... + 196938.

Almost surely, 2^129957888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129957888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173538004).

129957888 is an abundant number, since it is smaller than the sum of its proper divisors (217118120).

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

129957888 is an frugal number, since it uses more digits than its factorization.

129957888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 666 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 57.

The square root of 129957888 is about 11399.9073680447. The cubic root of 129957888 is about 506.5249957861.

The spelling of 129957888 in words is "one hundred twenty-nine million, nine hundred fifty-seven thousand, eight hundred eighty-eight".