129649432 has 32 divisors (see below), whose sum is σ = 269697600. Its totient is φ = 57930400.

The previous prime is 129649427. The next prime is 129649433. The reversal of 129649432 is 234946921.

129649432 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129649433) 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, 7294 + ... + 17677.

It is an arithmetic number, because the mean of its divisors is an integer number (8428050).

Almost surely, 2^129649432 is an apocalyptic number.

It is an amenable number.

129649432 is an abundant number, since it is smaller than the sum of its proper divisors (140048168).

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

129649432 is a wasteful number, since it uses less digits than its factorization.

129649432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25047 (or 25043 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 129649432 is about 11386.3704489183. The cubic root of 129649432 is about 506.1239313783.

The spelling of 129649432 in words is "one hundred twenty-nine million, six hundred forty-nine thousand, four hundred thirty-two".