129136884 has 24 divisors (see below), whose sum is σ = 311710560. Its totient is φ = 41561184.

The previous prime is 129136873. The next prime is 129136897. The reversal of 129136884 is 488631921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185194 + ... + 185889.

It is an arithmetic number, because the mean of its divisors is an integer number (12987940).

Almost surely, 2^129136884 is an apocalyptic number.

It is an amenable number.

129136884 is an abundant number, since it is smaller than the sum of its proper divisors (182573676).

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

129136884 is a wasteful number, since it uses less digits than its factorization.

129136884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371119 (or 371117 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 129136884 is about 11363.8410759743. The cubic root of 129136884 is about 505.4560909146.

The spelling of 129136884 in words is "one hundred twenty-nine million, one hundred thirty-six thousand, eight hundred eighty-four".