1865728 has 24 divisors (see below), whose sum is σ = 3734640. Its totient is φ = 931840.

The previous prime is 1865719. The next prime is 1865729. The reversal of 1865728 is 8275681.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1865729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1593 + ... + 2503.

It is an arithmetic number, because the mean of its divisors is an integer number (155610).

2^1865728 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 1865728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1867320).

1865728 is an abundant number, since it is smaller than the sum of its proper divisors (1868912).

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

1865728 is an frugal number, since it uses more digits than its factorization.

1865728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933 (or 913 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 1865728 is about 1365.9165421064. The cubic root of 1865728 is about 123.1070080300.

The spelling of 1865728 in words is "one million, eight hundred sixty-five thousand, seven hundred twenty-eight".