128012432 has 20 divisors (see below), whose sum is σ = 251519616. Its totient is φ = 63104160.

The previous prime is 128012413. The next prime is 128012447. The reversal of 128012432 is 234210821.

It is a happy number.

128012432 is a modest number, since divided by 12432 gives 128 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 128012398 and 128012407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55208 + ... + 57479.

Almost surely, 2^128012432 is an apocalyptic number.

It is an amenable number.

128012432 is a deficient number, since it is larger than the sum of its proper divisors (123507184).

128012432 is a wasteful number, since it uses less digits than its factorization.

128012432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112766 (or 112760 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 128012432 is about 11314.2579076137. The cubic root of 128012432 is about 503.9847354073.

The spelling of 128012432 in words is "one hundred twenty-eight million, twelve thousand, four hundred thirty-two".