129286830 has 32 divisors (see below), whose sum is σ = 326620800. Its totient is φ = 32661792.

The previous prime is 129286823. The next prime is 129286907. The reversal of 129286830 is 38682921.

It is a happy number.

It is a super-2 number, since 2×129286830² = 33430168822897800, which contains 22 as substring.

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, 112840 + ... + 113979.

It is an arithmetic number, because the mean of its divisors is an integer number (10206900).

Almost surely, 2^129286830 is an apocalyptic number.

129286830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129286830 is an abundant number, since it is smaller than the sum of its proper divisors (197333970).

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

129286830 is a wasteful number, since it uses less digits than its factorization.

129286830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226848.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 129286830 is about 11370.4366670766. The cubic root of 129286830 is about 505.6516503367.

The spelling of 129286830 in words is "one hundred twenty-nine million, two hundred eighty-six thousand, eight hundred thirty".