1863224 has 32 divisors (see below), whose sum is σ = 3939840. Its totient is φ = 818400.

The previous prime is 1863223. The next prime is 1863229. The reversal of 1863224 is 4223681.

It is a Cunningham number, because it is equal to 1365²-1.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1863193 and 1863202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1863223) 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 7 ways as a sum of consecutive naturals, for example, 2387 + ... + 3069.

It is an arithmetic number, because the mean of its divisors is an integer number (123120).

2^1863224 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 1863224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1969920).

1863224 is an abundant number, since it is smaller than the sum of its proper divisors (2076616).

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

1863224 is a wasteful number, since it uses less digits than its factorization.

1863224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 727 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 1863224 is about 1364.9996336996. Note that the first 3 decimals coincide. The cubic root of 1863224 is about 123.0519092596.

The spelling of 1863224 in words is "one million, eight hundred sixty-three thousand, two hundred twenty-four".