129746394 has 64 divisors (see below), whose sum is σ = 299566080. Its totient is φ = 41595120.

The previous prime is 129746389. The next prime is 129746429. The reversal of 129746394 is 493647921.

It is a happy number.

129746394 is a `hidden beast` number, since 1 + 2 + 9 + 7 + 4 + 639 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164469 + ... + 165255.

It is an arithmetic number, because the mean of its divisors is an integer number (4680720).

Almost surely, 2^129746394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129746394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149783040).

129746394 is an abundant number, since it is smaller than the sum of its proper divisors (169819686).

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

129746394 is a wasteful number, since it uses less digits than its factorization.

129746394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912 (or 906 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 129746394 is about 11390.6274629627. The cubic root of 129746394 is about 506.2500729767.

The spelling of 129746394 in words is "one hundred twenty-nine million, seven hundred forty-six thousand, three hundred ninety-four".