129233286 has 216 divisors, whose sum is σ = 384278040. Its totient is φ = 32078592.

The previous prime is 129233281. The next prime is 129233311. The reversal of 129233286 is 682332921.

It is a super-3 number, since 3×129233286³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129233286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129233281) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 7601950 + ... + 7601966.

It is an arithmetic number, because the mean of its divisors is an integer number (1779065).

Almost surely, 2^129233286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129233286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192139020).

129233286 is an abundant number, since it is smaller than the sum of its proper divisors (255044754).

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

129233286 is a wasteful number, since it uses less digits than its factorization.

129233286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 42 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 129233286 is about 11368.0818962567. The cubic root of 129233286 is about 505.5818356709.

Multiplying 129233286 by its product of digits (31104), we get a square (4019672127744 = 2004912²).

The spelling of 129233286 in words is "one hundred twenty-nine million, two hundred thirty-three thousand, two hundred eighty-six".