129367968 has 48 divisors (see below), whose sum is σ = 340179840. Its totient is φ = 43047936.

The previous prime is 129367967. The next prime is 129367993. The reversal of 129367968 is 869763921.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×129367968² = 33472142288898048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129367968.

It is not an unprimeable number, because it can be changed into a prime (129367967) 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, 99096 + ... + 100392.

It is an arithmetic number, because the mean of its divisors is an integer number (7087080).

Almost surely, 2^129367968 is an apocalyptic number.

It is an amenable number.

129367968 is an abundant number, since it is smaller than the sum of its proper divisors (210811872).

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

129367968 is a wasteful number, since it uses less digits than its factorization.

129367968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349 (or 2341 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 129367968 is about 11374.0040443109. The cubic root of 129367968 is about 505.7574073935.

The spelling of 129367968 in words is "one hundred twenty-nine million, three hundred sixty-seven thousand, nine hundred sixty-eight".