129284850 has 24 divisors (see below), whose sum is σ = 320626800. Its totient is φ = 34475920.

The previous prime is 129284833. The next prime is 129284893. The reversal of 129284850 is 58482921.

It is a junction number, because it is equal to n+sod(n) for n = 129284799 and 129284808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430800 + ... + 431099.

It is an arithmetic number, because the mean of its divisors is an integer number (13359450).

Almost surely, 2^129284850 is an apocalyptic number.

129284850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129284850 is an abundant number, since it is smaller than the sum of its proper divisors (191341950).

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

129284850 is a wasteful number, since it uses less digits than its factorization.

129284850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861914 (or 861909 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 129284850 is about 11370.3495988470. The cubic root of 129284850 is about 505.6490690080.

The spelling of 129284850 in words is "one hundred twenty-nine million, two hundred eighty-four thousand, eight hundred fifty".