128434458 has 16 divisors (see below), whose sum is σ = 257008320. Its totient is φ = 42788256.

The previous prime is 128434451. The next prime is 128434477. The reversal of 128434458 is 854434821.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128434451) 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, 9123 + ... + 18441.

It is an arithmetic number, because the mean of its divisors is an integer number (16063020).

Almost surely, 2^128434458 is an apocalyptic number.

128434458 is an abundant number, since it is smaller than the sum of its proper divisors (128573862).

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

128434458 is a wasteful number, since it uses less digits than its factorization.

128434458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11621.

The product of its digits is 122880, while the sum is 39.

The square root of 128434458 is about 11332.8927463380. The cubic root of 128434458 is about 504.5379664530.

The spelling of 128434458 in words is "one hundred twenty-eight million, four hundred thirty-four thousand, four hundred fifty-eight".