129791568 has 40 divisors (see below), whose sum is σ = 343478016. Its totient is φ = 42208000.

The previous prime is 129791561. The next prime is 129791573. The reversal of 129791568 is 865197921.

It is a super-2 number, since 2×129791568² = 33691702247797248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129791561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31008 + ... + 34943.

Almost surely, 2^129791568 is an apocalyptic number.

It is an amenable number.

129791568 is an abundant number, since it is smaller than the sum of its proper divisors (213686448).

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

129791568 is a wasteful number, since it uses less digits than its factorization.

129791568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66003 (or 65997 counting only the distinct ones).

The product of its digits is 272160, while the sum is 48.

The square root of 129791568 is about 11392.6102364647. The cubic root of 129791568 is about 506.3088201127.

The spelling of 129791568 in words is "one hundred twenty-nine million, seven hundred ninety-one thousand, five hundred sixty-eight".