128743422 has 16 divisors (see below), whose sum is σ = 258515712. Its totient is φ = 42743000.

The previous prime is 128743409. The next prime is 128743427. The reversal of 128743422 is 224347821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128743427) 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, 41238 + ... + 44249.

It is an arithmetic number, because the mean of its divisors is an integer number (16157232).

Almost surely, 2^128743422 is an apocalyptic number.

128743422 is an abundant number, since it is smaller than the sum of its proper divisors (129772290).

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

128743422 is a wasteful number, since it uses less digits than its factorization.

128743422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85743.

The product of its digits is 21504, while the sum is 33.

The square root of 128743422 is about 11346.5158528951. The cubic root of 128743422 is about 504.9422173537.

The spelling of 128743422 in words is "one hundred twenty-eight million, seven hundred forty-three thousand, four hundred twenty-two".