129788326 has 8 divisors (see below), whose sum is σ = 194737824. Its totient is φ = 64875720.

The previous prime is 129788279. The next prime is 129788327. The reversal of 129788326 is 623887921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129788327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2611 + ... + 16321.

It is an arithmetic number, because the mean of its divisors is an integer number (24342228).

Almost surely, 2^129788326 is an apocalyptic number.

129788326 is a deficient number, since it is larger than the sum of its proper divisors (64949498).

129788326 is a wasteful number, since it uses less digits than its factorization.

129788326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18446.

The product of its digits is 290304, while the sum is 46.

The square root of 129788326 is about 11392.4679503609. The cubic root of 129788326 is about 506.3046044642.

The spelling of 129788326 in words is "one hundred twenty-nine million, seven hundred eighty-eight thousand, three hundred twenty-six".