128254266 has 120 divisors (see below), whose sum is σ = 339663456. Its totient is φ = 36061200.

The previous prime is 128254219. The next prime is 128254267. The reversal of 128254266 is 662452821.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128254266.

It is not an unprimeable number, because it can be changed into a prime (128254267) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 849291 + ... + 849441.

Almost surely, 2^128254266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128254266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169831728).

128254266 is an abundant number, since it is smaller than the sum of its proper divisors (211409190).

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

128254266 is a wasteful number, since it uses less digits than its factorization.

128254266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 270 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 128254266 is about 11324.9399998411. The cubic root of 128254266 is about 504.3019024538.

The spelling of 128254266 in words is "one hundred twenty-eight million, two hundred fifty-four thousand, two hundred sixty-six".