1987444 has 12 divisors (see below), whose sum is σ = 3509604. Its totient is φ = 984704.

The previous prime is 1987439. The next prime is 1987451. The reversal of 1987444 is 4447891.

It can be written as a sum of positive squares in 2 ways, for example, as 374544 + 1612900 = 612^2 + 1270^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747 + ... + 2650.

It is an arithmetic number, because the mean of its divisors is an integer number (292467).

2^1987444 is an apocalyptic number.

It is an amenable number.

1987444 is a deficient number, since it is larger than the sum of its proper divisors (1522160).

1987444 is a wasteful number, since it uses less digits than its factorization.

1987444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514 (or 4512 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 1987444 is about 1409.7673566940. The cubic root of 1987444 is about 125.7278918272.

The spelling of 1987444 in words is "one million, nine hundred eighty-seven thousand, four hundred forty-four".