129890502 has 48 divisors (see below), whose sum is σ = 323811072. Its totient is φ = 36860400.

The previous prime is 129890477. The next prime is 129890503. The reversal of 129890502 is 205098921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129890503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15613 + ... + 22439.

It is an arithmetic number, because the mean of its divisors is an integer number (6746064).

Almost surely, 2^129890502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129890502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161905536).

129890502 is an abundant number, since it is smaller than the sum of its proper divisors (193920570).

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

129890502 is a wasteful number, since it uses less digits than its factorization.

129890502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6993 (or 6990 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 129890502 is about 11396.9514344846. The cubic root of 129890502 is about 506.4374325631.

The spelling of 129890502 in words is "one hundred twenty-nine million, eight hundred ninety thousand, five hundred two".