128469229 has 18 divisors (see below), whose sum is σ = 151512270. Its totient is φ = 108610992.

The previous prime is 128469193. The next prime is 128469287. The reversal of 128469229 is 922964821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 126225225 + 2244004 = 11235^2 + 1498^2 .

It is not a de Polignac number, because 128469229 - 2¹³ = 128461037 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128469529) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 560887 + ... + 561115.

Almost surely, 2^128469229 is an apocalyptic number.

It is an amenable number.

128469229 is a deficient number, since it is larger than the sum of its proper divisors (23043041).

128469229 is an equidigital number, since it uses as much as digits as its factorization.

128469229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 343 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 128469229 is about 11334.4267168657. The cubic root of 128469229 is about 504.5834934530.

The spelling of 128469229 in words is "one hundred twenty-eight million, four hundred sixty-nine thousand, two hundred twenty-nine".