129469632 has 28 divisors (see below), whose sum is σ = 342555576. Its totient is φ = 43156480.

The previous prime is 129469621. The next prime is 129469649. The reversal of 129469632 is 236964921.

It is a super-2 number, since 2×129469632² = 33524771220430848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336969 + ... + 337352.

Almost surely, 2^129469632 is an apocalyptic number.

129469632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129469632 is an abundant number, since it is smaller than the sum of its proper divisors (213085944).

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

129469632 is an equidigital number, since it uses as much as digits as its factorization.

129469632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674336 (or 674326 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 129469632 is about 11378.4723051911. The cubic root of 129469632 is about 505.8898560950.

It can be divided in two parts, 12946 and 9632, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 129469632 in words is "one hundred twenty-nine million, four hundred sixty-nine thousand, six hundred thirty-two".