1825664 has 32 divisors (see below), whose sum is σ = 3855600. Its totient is φ = 858112.

The previous prime is 1825661. The next prime is 1825667. The reversal of 1825664 is 4665281.

It is an interprime number because it is at equal distance from previous prime (1825661) and next prime (1825667).

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1825664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1825661) 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 3 ways as a sum of consecutive naturals, for example, 1757 + ... + 2595.

2^1825664 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 1825664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1927800).

1825664 is an abundant number, since it is smaller than the sum of its proper divisors (2029936).

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

1825664 is an equidigital number, since it uses as much as digits as its factorization.

1825664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 858 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 1825664 is about 1351.1713436867. The cubic root of 1825664 is about 122.2194384429.

The spelling of 1825664 in words is "one million, eight hundred twenty-five thousand, six hundred sixty-four".