129640060 has 24 divisors (see below), whose sum is σ = 296994096. Its totient is φ = 47141760.

The previous prime is 129640019. The next prime is 129640087. The reversal of 129640060 is 60046921.

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, 294417 + ... + 294856.

It is an arithmetic number, because the mean of its divisors is an integer number (12374754).

Almost surely, 2^129640060 is an apocalyptic number.

129640060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129640060 is an abundant number, since it is smaller than the sum of its proper divisors (167354036).

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

129640060 is a wasteful number, since it uses less digits than its factorization.

129640060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589293 (or 589291 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 129640060 is about 11385.9588968167. The cubic root of 129640060 is about 506.1117356499. Note that the first 3 decimals are identical.

Adding to 129640060 its reverse (60046921), we get a palindrome (189686981).

The spelling of 129640060 in words is "one hundred twenty-nine million, six hundred forty thousand, sixty".