129260886 has 16 divisors (see below), whose sum is σ = 266861568. Its totient is φ = 41697000.

The previous prime is 129260867. The next prime is 129260903. The reversal of 129260886 is 688062921.

It is a congruent number.

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, 347290 + ... + 347661.

It is an arithmetic number, because the mean of its divisors is an integer number (16678848).

Almost surely, 2^129260886 is an apocalyptic number.

129260886 is an abundant number, since it is smaller than the sum of its proper divisors (137600682).

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

129260886 is a wasteful number, since it uses less digits than its factorization.

129260886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694987.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 129260886 is about 11369.2957565541. The cubic root of 129260886 is about 505.6178250197.

The spelling of 129260886 in words is "one hundred twenty-nine million, two hundred sixty thousand, eight hundred eighty-six".