2321620 has 72 divisors (see below), whose sum is σ = 5975424. Its totient is φ = 753984.

The previous prime is 2321603. The next prime is 2321623. The reversal of 2321620 is 261232.

2321620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2321594 and 2321603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321623) 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 23 ways as a sum of consecutive naturals, for example, 22489 + ... + 22591.

It is an arithmetic number, because the mean of its divisors is an integer number (82992).

2^2321620 is an apocalyptic number.

2321620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2321620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2987712).

2321620 is an abundant number, since it is smaller than the sum of its proper divisors (3653804).

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

2321620 is a wasteful number, since it uses less digits than its factorization.

2321620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2321620 is about 1523.6863194240. The cubic root of 2321620 is about 132.4129248707.

Adding to 2321620 its reverse (261232), we get a palindrome (2582852).

The spelling of 2321620 in words is "two million, three hundred twenty-one thousand, six hundred twenty".