129276886 has 8 divisors (see below), whose sum is σ = 194271480. Its totient is φ = 64519728.

The previous prime is 129276883. The next prime is 129276887. The reversal of 129276886 is 688672921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129276883) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 57991 + ... + 60178.

It is an arithmetic number, because the mean of its divisors is an integer number (24283935).

Almost surely, 2^129276886 is an apocalyptic number.

129276886 is a deficient number, since it is larger than the sum of its proper divisors (64994594).

129276886 is a wasteful number, since it uses less digits than its factorization.

129276886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118718.

The product of its digits is 580608, while the sum is 49.

The square root of 129276886 is about 11369.9993843448. Note that the first 3 decimals coincide. The cubic root of 129276886 is about 505.6386860645.

The spelling of 129276886 in words is "one hundred twenty-nine million, two hundred seventy-six thousand, eight hundred eighty-six".