129260940 has 48 divisors (see below), whose sum is σ = 362734848. Its totient is φ = 34393024.

The previous prime is 129260909. The next prime is 129260953. The reversal of 129260940 is 49062921.

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, 28039 + ... + 32321.

It is an arithmetic number, because the mean of its divisors is an integer number (7556976).

Almost surely, 2^129260940 is an apocalyptic number.

129260940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129260940 is an abundant number, since it is smaller than the sum of its proper divisors (233473908).

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

129260940 is a wasteful number, since it uses less digits than its factorization.

129260940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4798 (or 4796 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 129260940 is about 11369.2981313712. The cubic root of 129260940 is about 505.6178954286.

The spelling of 129260940 in words is "one hundred twenty-nine million, two hundred sixty thousand, nine hundred forty".