128744229 has 8 divisors (see below), whose sum is σ = 174076992. Its totient is φ = 84620480.

The previous prime is 128744197. The next prime is 128744237. The reversal of 128744229 is 922447821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128744229 - 2⁵ = 128744197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128744249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302004 + ... + 302429.

It is an arithmetic number, because the mean of its divisors is an integer number (21759624).

Almost surely, 2^128744229 is an apocalyptic number.

It is an amenable number.

128744229 is a deficient number, since it is larger than the sum of its proper divisors (45332763).

128744229 is an equidigital number, since it uses as much as digits as its factorization.

128744229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604507.

The product of its digits is 64512, while the sum is 39.

The square root of 128744229 is about 11346.5514144166. The cubic root of 128744229 is about 504.9432723914.

The spelling of 128744229 in words is "one hundred twenty-eight million, seven hundred forty-four thousand, two hundred twenty-nine".