1887444 has 72 divisors (see below), whose sum is σ = 5325320. Its totient is φ = 559872.

The previous prime is 1887443. The next prime is 1887451. The reversal of 1887444 is 4447881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 476100 + 1411344 = 690^2 + 1188^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1887399 and 1887408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1887443) 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, 17262 + ... + 17370.

2^1887444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1887444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2662660).

1887444 is an abundant number, since it is smaller than the sum of its proper divisors (3437876).

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

1887444 is a wasteful number, since it uses less digits than its factorization.

1887444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 164 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 1887444 is about 1373.8427857655. The cubic root of 1887444 is about 123.5827983728.

The spelling of 1887444 in words is "one million, eight hundred eighty-seven thousand, four hundred forty-four".