1861344 has 72 divisors (see below), whose sum is σ = 5542992. Its totient is φ = 591360.

The previous prime is 1861339. The next prime is 1861351. The reversal of 1861344 is 4431681.

1861344 is a `hidden beast` number, since 1 + 8 + 613 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6484 + ... + 6764.

It is an arithmetic number, because the mean of its divisors is an integer number (76986).

2^1861344 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 1861344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2771496).

1861344 is an abundant number, since it is smaller than the sum of its proper divisors (3681648).

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

1861344 is a wasteful number, since it uses less digits than its factorization.

1861344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 309 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 1861344 is about 1364.3108150271. The cubic root of 1861344 is about 123.0105087194.

The spelling of 1861344 in words is "one million, eight hundred sixty-one thousand, three hundred forty-four".