129918284 has 24 divisors (see below), whose sum is σ = 243447120.
Its totient is φ = 60448256.
The previous prime is 129918277. The next prime is 129918343. The reversal of 129918284 is 482819921.
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, 4682 + ... + 16785.
It is an arithmetic number, because the mean of its divisors is an integer number (10143630).
Almost surely, 2129918284 is an apocalyptic number.
It is an amenable number.
129918284 is a deficient number, since it is larger than the sum of its proper divisors (113528836).
129918284 is a wasteful number, since it uses less digits than its factorization.
129918284 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 21577 (or 21575 counting only the distinct ones).
The product of its digits is 82944, while the sum is 44.
The square root of 129918284 is about 11398.1702040284.
The cubic root of 129918284 is about 506.4735369267.
The spelling of 129918284 in words is "one hundred twenty-nine million, nine hundred eighteen thousand, two hundred eighty-four".