129573432 has 48 divisors (see below), whose sum is σ = 363930840. Its totient is φ = 43190496.

The previous prime is 129573403. The next prime is 129573443. The reversal of 129573432 is 234375921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31383 + ... + 35270.

Almost surely, 2^129573432 is an apocalyptic number.

129573432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129573432 is an abundant number, since it is smaller than the sum of its proper divisors (234357408).

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

129573432 is an equidigital number, since it uses as much as digits as its factorization.

129573432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66674 (or 66658 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 129573432 is about 11383.0326363408. The cubic root of 129573432 is about 506.0250160785.

The spelling of 129573432 in words is "one hundred twenty-nine million, five hundred seventy-three thousand, four hundred thirty-two".