128133448 has 16 divisors (see below), whose sum is σ = 242630460. Its totient is φ = 63432000.

The previous prime is 128133433. The next prime is 128133449. The reversal of 128133448 is 844331821.

It can be written as a sum of positive squares in 2 ways, for example, as 113678244 + 14455204 = 10662^2 + 3802^2 .

It is not an unprimeable number, because it can be changed into a prime (128133449) 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, 78483 + ... + 80098.

Almost surely, 2^128133448 is an apocalyptic number.

It is an amenable number.

128133448 is a deficient number, since it is larger than the sum of its proper divisors (114497012).

128133448 is a wasteful number, since it uses less digits than its factorization.

128133448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158688 (or 158684 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 128133448 is about 11319.6045867336. The cubic root of 128133448 is about 504.1434986538.

It can be divided in two parts, 12813 and 3448, that added together give a palindrome (16261).

The spelling of 128133448 in words is "one hundred twenty-eight million, one hundred thirty-three thousand, four hundred forty-eight".