128611443 has 16 divisors (see below), whose sum is σ = 184998816. Its totient is φ = 79173120.

The previous prime is 128611393. The next prime is 128611489. The reversal of 128611443 is 344116821.

It is a de Polignac number, because none of the positive numbers 2^k-128611443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128611443.

It is not an unprimeable number, because it can be changed into a prime (128611243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21088 + ... + 26493.

It is an arithmetic number, because the mean of its divisors is an integer number (11562426).

Almost surely, 2^128611443 is an apocalyptic number.

128611443 is a deficient number, since it is larger than the sum of its proper divisors (56387373).

128611443 is a wasteful number, since it uses less digits than its factorization.

128611443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47654.

The product of its digits is 4608, while the sum is 30.

The square root of 128611443 is about 11340.6985234597. The cubic root of 128611443 is about 504.7696142204.

The spelling of 128611443 in words is "one hundred twenty-eight million, six hundred eleven thousand, four hundred forty-three".