129408680 has 16 divisors (see below), whose sum is σ = 291169620. Its totient is φ = 51763456.

The previous prime is 129408679. The next prime is 129408683. The reversal of 129408680 is 86804921.

It can be written as a sum of positive squares in 2 ways, for example, as 129367876 + 40804 = 11374^2 + 202^2 .

It is not an unprimeable number, because it can be changed into a prime (129408683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617569 + ... + 1617648.

Almost surely, 2^129408680 is an apocalyptic number.

129408680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129408680 is an abundant number, since it is smaller than the sum of its proper divisors (161760940).

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

129408680 is a wasteful number, since it uses less digits than its factorization.

129408680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235228 (or 3235224 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 129408680 is about 11375.7935986902. The cubic root of 129408680 is about 505.8104556515.

The spelling of 129408680 in words is "one hundred twenty-nine million, four hundred eight thousand, six hundred eighty".