129424836 has 24 divisors (see below), whose sum is σ = 302270080. Its totient is φ = 43101792.

The previous prime is 129424829. The next prime is 129424843. The reversal of 129424836 is 638424921.

It is an interprime number because it is at equal distance from previous prime (129424829) and next prime (129424843).

It is a junction number, because it is equal to n+sod(n) for n = 129424794 and 129424803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10485 + ... + 19203.

Almost surely, 2^129424836 is an apocalyptic number.

It is an amenable number.

129424836 is an abundant number, since it is smaller than the sum of its proper divisors (172845244).

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

129424836 is a wasteful number, since it uses less digits than its factorization.

129424836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9963 (or 9961 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 129424836 is about 11376.5036808327. The cubic root of 129424836 is about 505.8315040429.

The spelling of 129424836 in words is "one hundred twenty-nine million, four hundred twenty-four thousand, eight hundred thirty-six".