129285846 has 24 divisors (see below), whose sum is σ = 282140040. Its totient is φ = 42784416.

The previous prime is 129285809. The next prime is 129285859. The reversal of 129285846 is 648582921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23335 + ... + 28338.

It is an arithmetic number, because the mean of its divisors is an integer number (11755835).

Almost surely, 2^129285846 is an apocalyptic number.

129285846 is an abundant number, since it is smaller than the sum of its proper divisors (152854194).

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

129285846 is a wasteful number, since it uses less digits than its factorization.

129285846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51820 (or 51817 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 129285846 is about 11370.3933968883. The cubic root of 129285846 is about 505.6503674978.

The spelling of 129285846 in words is "one hundred twenty-nine million, two hundred eighty-five thousand, eight hundred forty-six".