128396229 has 12 divisors (see below), whose sum is σ = 185377536. Its totient is φ = 79012752.

The previous prime is 128396221. The next prime is 128396231. The reversal of 128396229 is 922693821.

It is not a de Polignac number, because 128396229 - 2³ = 128396221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128396221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126117 + ... + 127130.

It is an arithmetic number, because the mean of its divisors is an integer number (15448128).

Almost surely, 2^128396229 is an apocalyptic number.

It is an amenable number.

128396229 is a deficient number, since it is larger than the sum of its proper divisors (56981307).

128396229 is a wasteful number, since it uses less digits than its factorization.

128396229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253276 (or 253263 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 128396229 is about 11331.2059817126. The cubic root of 128396229 is about 504.4879022769.

The spelling of 128396229 in words is "one hundred twenty-eight million, three hundred ninety-six thousand, two hundred twenty-nine".