129288924 has 18 divisors (see below), whose sum is σ = 326813760. Its totient is φ = 43096296.

The previous prime is 129288899. The next prime is 129288937. The reversal of 129288924 is 429882921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 129288924.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1795644 + ... + 1795715.

It is an arithmetic number, because the mean of its divisors is an integer number (18156320).

Almost surely, 2^129288924 is an apocalyptic number.

It is an amenable number.

129288924 is an abundant number, since it is smaller than the sum of its proper divisors (197524836).

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

129288924 is a wasteful number, since it uses less digits than its factorization.

129288924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3591369 (or 3591364 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 129288924 is about 11370.5287476001. The cubic root of 129288924 is about 505.6543802585.

The spelling of 129288924 in words is "one hundred twenty-nine million, two hundred eighty-eight thousand, nine hundred twenty-four".