1988558 has 32 divisors (see below), whose sum is σ = 3719520. Its totient is φ = 783360.

The previous prime is 1988551. The next prime is 1988561. The reversal of 1988558 is 8558891.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988551) 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, 4658 + ... + 5066.

It is an arithmetic number, because the mean of its divisors is an integer number (116235).

2^1988558 is an apocalyptic number.

1988558 is a deficient number, since it is larger than the sum of its proper divisors (1730962).

1988558 is a wasteful number, since it uses less digits than its factorization.

With its successor (1988559) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (452).

1988558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452.

The product of its digits is 115200, while the sum is 44.

The square root of 1988558 is about 1410.1624019949. The cubic root of 1988558 is about 125.7513783944.

The spelling of 1988558 in words is "one million, nine hundred eighty-eight thousand, five hundred fifty-eight".