129857024 has 40 divisors (see below), whose sum is σ = 283060008. Its totient is φ = 59023360.

The previous prime is 129857023. The next prime is 129857071. The reversal of 129857024 is 420758921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129857023) 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, 5897 + ... + 17160.

Almost surely, 2^129857024 is an apocalyptic number.

It is an amenable number.

129857024 is an abundant number, since it is smaller than the sum of its proper divisors (153202984).

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

129857024 is an equidigital number, since it uses as much as digits as its factorization.

129857024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23086 (or 23070 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 129857024 is about 11395.4826137378. The cubic root of 129857024 is about 506.3939190679.

The spelling of 129857024 in words is "one hundred twenty-nine million, eight hundred fifty-seven thousand, twenty-four".