129386036 has 12 divisors (see below), whose sum is σ = 243843012. Its totient is φ = 59716608.

The previous prime is 129386027. The next prime is 129386039. The reversal of 129386036 is 630683921.

It can be written as a sum of positive squares in 2 ways, for example, as 38068900 + 91317136 = 6170^2 + 9556^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129386039) 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, 1244045 + ... + 1244148.

It is an arithmetic number, because the mean of its divisors is an integer number (20320251).

Almost surely, 2^129386036 is an apocalyptic number.

It is an amenable number.

129386036 is a deficient number, since it is larger than the sum of its proper divisors (114456976).

129386036 is a wasteful number, since it uses less digits than its factorization.

129386036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488210 (or 2488208 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 129386036 is about 11374.7982839257. The cubic root of 129386036 is about 505.7809516025.

The spelling of 129386036 in words is "one hundred twenty-nine million, three hundred eighty-six thousand, thirty-six".