128843742 has 32 divisors (see below), whose sum is σ = 265319712. Its totient is φ = 41693184.

The previous prime is 128843717. The next prime is 128843749. The reversal of 128843742 is 247348821.

It is a self number, because there is not a number n which added to its sum of digits gives 128843742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128843749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28758 + ... + 32934.

It is an arithmetic number, because the mean of its divisors is an integer number (8291241).

Almost surely, 2^128843742 is an apocalyptic number.

128843742 is an abundant number, since it is smaller than the sum of its proper divisors (136475970).

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

128843742 is a wasteful number, since it uses less digits than its factorization.

128843742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332.

The product of its digits is 86016, while the sum is 39.

The square root of 128843742 is about 11350.9357323526. The cubic root of 128843742 is about 505.0733377137.

The spelling of 128843742 in words is "one hundred twenty-eight million, eight hundred forty-three thousand, seven hundred forty-two".