1986444 has 30 divisors (see below), whose sum is σ = 5193804. Its totient is φ = 662040.

The previous prime is 1986443. The next prime is 1986461. The reversal of 1986444 is 4446891.

It is a happy number.

1986444 is a `hidden beast` number, since 1 + 9 + 8 + 644 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1986399 and 1986408.

It is not an unprimeable number, because it can be changed into a prime (1986443) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2742 + ... + 3389.

2^1986444 is an apocalyptic number.

It is an amenable number.

1986444 is an abundant number, since it is smaller than the sum of its proper divisors (3207360).

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

1986444 is a wasteful number, since it uses less digits than its factorization.

1986444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6147 (or 6136 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1986444 is about 1409.4126436214. The cubic root of 1986444 is about 125.7068012565.

The spelling of 1986444 in words is "one million, nine hundred eighty-six thousand, four hundred forty-four".