1987844 has 48 divisors (see below), whose sum is σ = 4064256. Its totient is φ = 844800.

The previous prime is 1987841. The next prime is 1987849. The reversal of 1987844 is 4487891.

1987844 = T₂₀₇ + T₂₀₈ + ... + T₂₇₄.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48464 + ... + 48504.

It is an arithmetic number, because the mean of its divisors is an integer number (84672).

2^1987844 is an apocalyptic number.

It is an amenable number.

1987844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1987844 is a wasteful number, since it uses less digits than its factorization.

1987844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 114 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 1987844 is about 1409.9092169356. The cubic root of 1987844 is about 125.7363260746.

1987844 divided by its sum of digits (41) gives a palindrome (48484).

The spelling of 1987844 in words is "one million, nine hundred eighty-seven thousand, eight hundred forty-four".