129449660 has 24 divisors (see below), whose sum is σ = 286152720. Its totient is φ = 49054464.

The previous prime is 129449657. The next prime is 129449711. The reversal of 129449660 is 66944921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169949 + ... + 170708.

It is an arithmetic number, because the mean of its divisors is an integer number (11923030).

Almost surely, 2^129449660 is an apocalyptic number.

129449660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129449660 is an abundant number, since it is smaller than the sum of its proper divisors (156703060).

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

129449660 is a wasteful number, since it uses less digits than its factorization.

129449660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340685 (or 340683 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 129449660 is about 11377.5946491339. The cubic root of 129449660 is about 505.8638418820.

The spelling of 129449660 in words is "one hundred twenty-nine million, four hundred forty-nine thousand, six hundred sixty".