128443938 has 32 divisors (see below), whose sum is σ = 297614976. Its totient is φ = 36194688.

The previous prime is 128443927. The next prime is 128443957. The reversal of 128443938 is 839344821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 128443938.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17881 + ... + 24012.

It is an arithmetic number, because the mean of its divisors is an integer number (9300468).

Almost surely, 2^128443938 is an apocalyptic number.

128443938 is an abundant number, since it is smaller than the sum of its proper divisors (169171038).

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

128443938 is a wasteful number, since it uses less digits than its factorization.

128443938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41978.

The product of its digits is 165888, while the sum is 42.

The square root of 128443938 is about 11333.3109901741. The cubic root of 128443938 is about 504.5503797942.

The spelling of 128443938 in words is "one hundred twenty-eight million, four hundred forty-three thousand, nine hundred thirty-eight".