129788946 has 96 divisors (see below), whose sum is σ = 338607360. Its totient is φ = 36741600.

The previous prime is 129788927. The next prime is 129788957. The reversal of 129788946 is 649887921.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 129788892 and 129788901.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 478791 + ... + 479061.

It is an arithmetic number, because the mean of its divisors is an integer number (3527160).

Almost surely, 2^129788946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129788946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169303680).

129788946 is an abundant number, since it is smaller than the sum of its proper divisors (208818414).

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

129788946 is a wasteful number, since it uses less digits than its factorization.

129788946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 464 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 129788946 is about 11392.4951612893. The cubic root of 129788946 is about 506.3054106702.

The spelling of 129788946 in words is "one hundred twenty-nine million, seven hundred eighty-eight thousand, nine hundred forty-six".