128872422 has 24 divisors (see below), whose sum is σ = 319112976. Its totient is φ = 36820656.

The previous prime is 128872399. The next prime is 128872439. The reversal of 128872422 is 224278821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 511273 + ... + 511524.

It is an arithmetic number, because the mean of its divisors is an integer number (13296374).

Almost surely, 2^128872422 is an apocalyptic number.

128872422 is an abundant number, since it is smaller than the sum of its proper divisors (190240554).

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

128872422 is a wasteful number, since it uses less digits than its factorization.

128872422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022812 (or 1022809 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 128872422 is about 11352.1989940275. The cubic root of 128872422 is about 505.1108105689.

The spelling of 128872422 in words is "one hundred twenty-eight million, eight hundred seventy-two thousand, four hundred twenty-two".