129036432 has 80 divisors (see below), whose sum is σ = 389117952. Its totient is φ = 36078720.

The previous prime is 129036431. The next prime is 129036433. The reversal of 129036432 is 234630921.

It is an interprime number because it is at equal distance from previous prime (129036431) and next prime (129036433).

It is a self number, because there is not a number n which added to its sum of digits gives 129036432.

It is not an unprimeable number, because it can be changed into a prime (129036431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11707 + ... + 19877.

Almost surely, 2^129036432 is an apocalyptic number.

129036432 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 129036432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194558976).

129036432 is an abundant number, since it is smaller than the sum of its proper divisors (260081520).

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

129036432 is a wasteful number, since it uses less digits than its factorization.

129036432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8236 (or 8230 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 129036432 is about 11359.4204077497. The cubic root of 129036432 is about 505.3249968264.

The spelling of 129036432 in words is "one hundred twenty-nine million, thirty-six thousand, four hundred thirty-two".