1988888 has 32 divisors (see below), whose sum is σ = 4127760. Its totient is φ = 890880.

The previous prime is 1988887. The next prime is 1988891. The reversal of 1988888 is 8888891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988887) 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, 8420 + ... + 8652.

2^1988888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1988888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2063880).

1988888 is an abundant number, since it is smaller than the sum of its proper divisors (2138872).

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

1988888 is a wasteful number, since it uses less digits than its factorization.

1988888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 343 counting only the distinct ones).

The product of its digits is 294912, while the sum is 50.

The square root of 1988888 is about 1410.2794049407. The cubic root of 1988888 is about 125.7583341314.

It can be divided in two parts, 1 and 988888, that added together give a palindrome (988889).

The spelling of 1988888 in words is "one million, nine hundred eighty-eight thousand, eight hundred eighty-eight".