129227730 has 16 divisors (see below), whose sum is σ = 310146624. Its totient is φ = 34460720.

The previous prime is 129227719. The next prime is 129227737. The reversal of 129227730 is 37722921.

It is a junction number, because it is equal to n+sod(n) for n = 129227691 and 129227700.

It is not an unprimeable number, because it can be changed into a prime (129227737) 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, 2153766 + ... + 2153825.

It is an arithmetic number, because the mean of its divisors is an integer number (19384164).

Almost surely, 2^129227730 is an apocalyptic number.

129227730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129227730 is an abundant number, since it is smaller than the sum of its proper divisors (180918894).

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

129227730 is a wasteful number, since it uses less digits than its factorization.

129227730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307601.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 129227730 is about 11367.8375252288. The cubic root of 129227730 is about 505.5745902390.

The spelling of 129227730 in words is "one hundred twenty-nine million, two hundred twenty-seven thousand, seven hundred thirty".