128458432 has 28 divisors (see below), whose sum is σ = 259726176. Its totient is φ = 63015680.

The previous prime is 128458423. The next prime is 128458433. The reversal of 128458432 is 234854821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128458391 and 128458400.

It is not an unprimeable number, because it can be changed into a prime (128458433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15544 + ... + 22327.

Almost surely, 2^128458432 is an apocalyptic number.

It is an amenable number.

128458432 is an abundant number, since it is smaller than the sum of its proper divisors (131267744).

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

128458432 is an equidigital number, since it uses as much as digits as its factorization.

128458432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37936 (or 37926 counting only the distinct ones).

The product of its digits is 61440, while the sum is 37.

The square root of 128458432 is about 11333.9504145730. The cubic root of 128458432 is about 504.5693574074.

The spelling of 128458432 in words is "one hundred twenty-eight million, four hundred fifty-eight thousand, four hundred thirty-two".