129007836 has 24 divisors (see below), whose sum is σ = 334465040. Its totient is φ = 43002576.

The previous prime is 129007819. The next prime is 129007841. The reversal of 129007836 is 638700921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 129007836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597151 + ... + 597366.

Almost surely, 2^129007836 is an apocalyptic number.

It is an amenable number.

129007836 is an abundant number, since it is smaller than the sum of its proper divisors (205457204).

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

129007836 is a wasteful number, since it uses less digits than its factorization.

129007836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194530 (or 1194522 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 129007836 is about 11358.1616470272. The cubic root of 129007836 is about 505.2876654025.

It can be divided in two parts, 12900 and 7836, that added together give a 4-th power (20736 = 12⁴).

The spelling of 129007836 in words is "one hundred twenty-nine million, seven thousand, eight hundred thirty-six".