129869232 has 40 divisors (see below), whose sum is σ = 336280560. Its totient is φ = 43188480.

The previous prime is 129869231. The next prime is 129869251. The reversal of 129869232 is 232968921.

It is not an unprimeable number, because it can be changed into a prime (129869231) 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, 19194 + ... + 25062.

It is an arithmetic number, because the mean of its divisors is an integer number (8407014).

Almost surely, 2^129869232 is an apocalyptic number.

129869232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129869232 is an abundant number, since it is smaller than the sum of its proper divisors (206411328).

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

129869232 is a wasteful number, since it uses less digits than its factorization.

129869232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6341 (or 6335 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 129869232 is about 11396.0182520036. The cubic root of 129869232 is about 506.4097874516.

The spelling of 129869232 in words is "one hundred twenty-nine million, eight hundred sixty-nine thousand, two hundred thirty-two".