129860832 has 48 divisors (see below), whose sum is σ = 345219840. Its totient is φ = 42736512.

The previous prime is 129860827. The next prime is 129860837. The reversal of 129860832 is 238068921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129860827) and next prime (129860837).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129860837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978 + ... + 16145.

It is an arithmetic number, because the mean of its divisors is an integer number (7192080).

Almost surely, 2^129860832 is an apocalyptic number.

129860832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129860832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172609920).

129860832 is an abundant number, since it is smaller than the sum of its proper divisors (215359008).

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

129860832 is a wasteful number, since it uses less digits than its factorization.

129860832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17215 (or 17207 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 129860832 is about 11395.6496962657. The cubic root of 129860832 is about 506.3988689457.

The spelling of 129860832 in words is "one hundred twenty-nine million, eight hundred sixty thousand, eight hundred thirty-two".