1987288 has 32 divisors (see below), whose sum is σ = 3920400. Its totient is φ = 943488.

The previous prime is 1987277. The next prime is 1987291. The reversal of 1987288 is 8827891.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 7 ways as a sum of consecutive naturals, for example, 18178 + ... + 18286.

2^1987288 is an apocalyptic number.

It is an amenable number.

1987288 is a deficient number, since it is larger than the sum of its proper divisors (1933112).

1987288 is a wasteful number, since it uses less digits than its factorization.

1987288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 207 counting only the distinct ones).

The product of its digits is 64512, while the sum is 43.

The square root of 1987288 is about 1409.7120273304. The cubic root of 1987288 is about 125.7246021640.

The spelling of 1987288 in words is "one million, nine hundred eighty-seven thousand, two hundred eighty-eight".