1988443 has 4 divisors (see below), whose sum is σ = 2057040. Its totient is φ = 1919848.

The previous prime is 1988423. The next prime is 1988453. The reversal of 1988443 is 3448891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1988443 - 2⁵ = 1988411 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1988423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34255 + ... + 34312.

It is an arithmetic number, because the mean of its divisors is an integer number (514260).

2^1988443 is an apocalyptic number.

1988443 is a deficient number, since it is larger than the sum of its proper divisors (68597).

1988443 is an equidigital number, since it uses as much as digits as its factorization.

1988443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68596.

The product of its digits is 27648, while the sum is 37.

The square root of 1988443 is about 1410.1216259600. The cubic root of 1988443 is about 125.7489542446.

The spelling of 1988443 in words is "one million, nine hundred eighty-eight thousand, four hundred forty-three".