129810432 has 120 divisors (see below), whose sum is σ = 366990400. Its totient is φ = 40697856.

The previous prime is 129810431. The next prime is 129810433. The reversal of 129810432 is 234018921.

It is an interprime number because it is at equal distance from previous prime (129810431) and next prime (129810433).

It is a self number, because there is not a number n which added to its sum of digits gives 129810432.

It is not an unprimeable number, because it can be changed into a prime (129810431) 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, 933819 + ... + 933957.

Almost surely, 2^129810432 is an apocalyptic number.

129810432 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 129810432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183495200).

129810432 is an abundant number, since it is smaller than the sum of its proper divisors (237179968).

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

129810432 is an equidigital number, since it uses as much as digits as its factorization.

129810432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 129810432 is about 11393.4381114745. The cubic root of 129810432 is about 506.3333480206. Note that the first 4 decimals are identical.

The spelling of 129810432 in words is "one hundred twenty-nine million, eight hundred ten thousand, four hundred thirty-two".