129328516 has 24 divisors (see below), whose sum is σ = 246456000. Its totient is φ = 59147424.

The previous prime is 129328499. The next prime is 129328523. The reversal of 129328516 is 615823921.

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, 27136 + ... + 31543.

It is an arithmetic number, because the mean of its divisors is an integer number (10269000).

Almost surely, 2^129328516 is an apocalyptic number.

It is an amenable number.

129328516 is a deficient number, since it is larger than the sum of its proper divisors (117127484).

129328516 is a wasteful number, since it uses less digits than its factorization.

129328516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58731 (or 58729 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 129328516 is about 11372.2696063715. The cubic root of 129328516 is about 505.7059903125.

The spelling of 129328516 in words is "one hundred twenty-nine million, three hundred twenty-eight thousand, five hundred sixteen".