129902032 has 60 divisors (see below), whose sum is σ = 288060556. Its totient is φ = 56401920.

The previous prime is 129902029. The next prime is 129902039. The reversal of 129902032 is 230209921.

It can be written as a sum of positive squares in 6 ways, for example, as 3474496 + 126427536 = 1864^2 + 11244^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129902039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59032 + ... + 61192.

Almost surely, 2^129902032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129902032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144030278).

129902032 is an abundant number, since it is smaller than the sum of its proper divisors (158158524).

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

129902032 is a wasteful number, since it uses less digits than its factorization.

129902032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216 (or 2193 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 129902032 is about 11397.4572602840. The cubic root of 129902032 is about 506.4524171097.

The spelling of 129902032 in words is "one hundred twenty-nine million, nine hundred two thousand, thirty-two".