128443937 has 8 divisors (see below), whose sum is σ = 134344320. Its totient is φ = 122569920.

The previous prime is 128443927. The next prime is 128443957. The reversal of 128443937 is 739344821.

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

It is a cyclic number.

It is not a de Polignac number, because 128443937 - 2⁴ = 128443921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128443894 and 128443903.

It is not an unprimeable number, because it can be changed into a prime (128443907) 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, 3737 + ... + 16457.

It is an arithmetic number, because the mean of its divisors is an integer number (16793040).

Almost surely, 2^128443937 is an apocalyptic number.

It is an amenable number.

128443937 is a deficient number, since it is larger than the sum of its proper divisors (5900383).

128443937 is a wasteful number, since it uses less digits than its factorization.

128443937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13183.

The product of its digits is 145152, while the sum is 41.

The square root of 128443937 is about 11333.3109460563. The cubic root of 128443937 is about 504.5503784848.

The spelling of 128443937 in words is "one hundred twenty-eight million, four hundred forty-three thousand, nine hundred thirty-seven".