129442284 has 36 divisors (see below), whose sum is σ = 346450104. Its totient is φ = 40609152.

The previous prime is 129442273. The next prime is 129442297. The reversal of 129442284 is 482244921.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105142 + ... + 106365.

It is an arithmetic number, because the mean of its divisors is an integer number (9623614).

Almost surely, 2^129442284 is an apocalyptic number.

It is an amenable number.

129442284 is an abundant number, since it is smaller than the sum of its proper divisors (217007820).

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

129442284 is a wasteful number, since it uses less digits than its factorization.

129442284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211534 (or 211529 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 129442284 is about 11377.2704986741. The cubic root of 129442284 is about 505.8542337131.

The spelling of 129442284 in words is "one hundred twenty-nine million, four hundred forty-two thousand, two hundred eighty-four".