1988688 has 40 divisors (see below), whose sum is σ = 5534368. Its totient is φ = 611712.

The previous prime is 1988683. The next prime is 1988689. The reversal of 1988688 is 8868891.

It is a super-2 number, since 2×1988688² = 7909759922688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988683) 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, 970 + ... + 2217.

2^1988688 is an apocalyptic number.

It is an amenable number.

1988688 is an abundant number, since it is smaller than the sum of its proper divisors (3545680).

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

1988688 is a wasteful number, since it uses less digits than its factorization.

1988688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211 (or 3205 counting only the distinct ones).

The product of its digits is 221184, while the sum is 48.

The square root of 1988688 is about 1410.2084952233. The cubic root of 1988688 is about 125.7541186250.

The spelling of 1988688 in words is "one million, nine hundred eighty-eight thousand, six hundred eighty-eight".