129438516 has 48 divisors (see below), whose sum is σ = 312972800. Its totient is φ = 41592960.

The previous prime is 129438497. The next prime is 129438539. The reversal of 129438516 is 615834921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129330 + ... + 130326.

Almost surely, 2^129438516 is an apocalyptic number.

It is an amenable number.

129438516 is an abundant number, since it is smaller than the sum of its proper divisors (183534284).

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

129438516 is a wasteful number, since it uses less digits than its factorization.

129438516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384 (or 1382 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 129438516 is about 11377.1049041485. The cubic root of 129438516 is about 505.8493252778.

The spelling of 129438516 in words is "one hundred twenty-nine million, four hundred thirty-eight thousand, five hundred sixteen".