129834936 has 144 divisors (see below), whose sum is σ = 441932400. Its totient is φ = 33707520.

The previous prime is 129834917. The next prime is 129834937. The reversal of 129834936 is 639438921.

It is a happy number.

It is a super-2 number, since 2×129834936² = 33714221212248192, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 129834891 and 129834900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129834937) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 59920 + ... + 62048.

It is an arithmetic number, because the mean of its divisors is an integer number (3068975).

Almost surely, 2^129834936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129834936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220966200).

129834936 is an abundant number, since it is smaller than the sum of its proper divisors (312097464).

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

129834936 is a wasteful number, since it uses less digits than its factorization.

129834936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170 (or 2152 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 129834936 is about 11394.5134165527. The cubic root of 129834936 is about 506.3652057883.

The spelling of 129834936 in words is "one hundred twenty-nine million, eight hundred thirty-four thousand, nine hundred thirty-six".