1987700 has 72 divisors (see below), whose sum is σ = 5103840. Its totient is φ = 662400.

The previous prime is 1987697. The next prime is 1987703. The reversal of 1987700 is 77891.

It is an interprime number because it is at equal distance from previous prime (1987697) and next prime (1987703).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987703) by changing a digit.

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, 14231 + ... + 14369.

2^1987700 is an apocalyptic number.

1987700 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 1987700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2551920).

1987700 is an abundant number, since it is smaller than the sum of its proper divisors (3116140).

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

1987700 is a wasteful number, since it uses less digits than its factorization.

1987700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 1987700 is about 1409.8581488930. The cubic root of 1987700 is about 125.7332898759.

The spelling of 1987700 in words is "one million, nine hundred eighty-seven thousand, seven hundred".