128040422 has 8 divisors (see below), whose sum is σ = 192612000. Its totient is φ = 63836424.

The previous prime is 128040401. The next prime is 128040431. The reversal of 128040422 is 224040821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91022 + ... + 92417.

It is an arithmetic number, because the mean of its divisors is an integer number (24076500).

Almost surely, 2^128040422 is an apocalyptic number.

128040422 is a deficient number, since it is larger than the sum of its proper divisors (64571578).

128040422 is a wasteful number, since it uses less digits than its factorization.

128040422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183790.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 128040422 is about 11315.4947748651. The cubic root of 128040422 is about 504.0214649252.

The spelling of 128040422 in words is "one hundred twenty-eight million, forty thousand, four hundred twenty-two".