129116730 has 16 divisors (see below), whose sum is σ = 309880224. Its totient is φ = 34431120.

The previous prime is 129116719. The next prime is 129116737. The reversal of 129116730 is 37611921.

It is a super-2 number, since 2×129116730² = 33342259931785800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 4303891 = 129116730 / (1 + 2 + 9 + 1 + 1 + 6 + 7 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (129116737) 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, 2151916 + ... + 2151975.

It is an arithmetic number, because the mean of its divisors is an integer number (19367514).

Almost surely, 2^129116730 is an apocalyptic number.

129116730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129116730 is an abundant number, since it is smaller than the sum of its proper divisors (180763494).

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

129116730 is a wasteful number, since it uses less digits than its factorization.

129116730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303901.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 129116730 is about 11362.9542813478. The cubic root of 129116730 is about 505.4297945492.

The spelling of 129116730 in words is "one hundred twenty-nine million, one hundred sixteen thousand, seven hundred thirty".