1988700 has 72 divisors (see below), whose sum is σ = 6582912. Its totient is φ = 454080.

The previous prime is 1988699. The next prime is 1988729. The reversal of 1988700 is 78891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1627 + ... + 2573.

2^1988700 is an apocalyptic number.

1988700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1988700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3291456).

1988700 is an abundant number, since it is smaller than the sum of its proper divisors (4594212).

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

1988700 is a wasteful number, since it uses less digits than its factorization.

1988700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 1988700 is about 1410.2127499069. The cubic root of 1988700 is about 125.7543715634.

The spelling of 1988700 in words is "one million, nine hundred eighty-eight thousand, seven hundred".