129140244 has 30 divisors (see below), whose sum is σ = 337598954. Its totient is φ = 43046640.

The previous prime is 129140227. The next prime is 129140251. The reversal of 129140244 is 442041921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 128595600 + 544644 = 11340^2 + 738^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 198967 + ... + 199614.

Almost surely, 2^129140244 is an apocalyptic number.

It is an amenable number.

129140244 is an abundant number, since it is smaller than the sum of its proper divisors (208458710).

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

129140244 is a wasteful number, since it uses less digits than its factorization.

129140244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398597 (or 398586 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 129140244 is about 11363.9889123494. The cubic root of 129140244 is about 505.4604746808.

The spelling of 129140244 in words is "one hundred twenty-nine million, one hundred forty thousand, two hundred forty-four".