129896406 has 32 divisors (see below), whose sum is σ = 293558400. Its totient is φ = 42563880.

The previous prime is 129896399. The next prime is 129896443. The reversal of 129896406 is 604698921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17200 + ... + 23571.

It is an arithmetic number, because the mean of its divisors is an integer number (9173700).

Almost surely, 2^129896406 is an apocalyptic number.

129896406 is an abundant number, since it is smaller than the sum of its proper divisors (163661994).

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

129896406 is a wasteful number, since it uses less digits than its factorization.

129896406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40841 (or 40835 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 129896406 is about 11397.2104481755. The cubic root of 129896406 is about 506.4451055935.

The spelling of 129896406 in words is "one hundred twenty-nine million, eight hundred ninety-six thousand, four hundred six".