2321664 has 36 divisors (see below), whose sum is σ = 6181056. Its totient is φ = 773632.

The previous prime is 2321647. The next prime is 2321677. The reversal of 2321664 is 4661232.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 3 ways as a sum of consecutive naturals, for example, 744 + ... + 2279.

It is an arithmetic number, because the mean of its divisors is an integer number (171696).

2^2321664 is an apocalyptic number.

2321664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2321664 is an abundant number, since it is smaller than the sum of its proper divisors (3859392).

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

2321664 is an equidigital number, since it uses as much as digits as its factorization.

2321664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042 (or 3028 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 2321664 is about 1523.7007580230. The cubic root of 2321664 is about 132.4137613745.

Adding to 2321664 its reverse (4661232), we get a palindrome (6982896).

The spelling of 2321664 in words is "two million, three hundred twenty-one thousand, six hundred sixty-four".