2621320 has 48 divisors (see below), whose sum is σ = 6442380. Its totient is φ = 954240.

The previous prime is 2621309. The next prime is 2621347. The reversal of 2621320 is 231262.

2621320 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2439844 + 181476 = 1562^2 + 426^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2621294 and 2621303.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36885 + ... + 36955.

2^2621320 is an apocalyptic number.

2621320 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 2621320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3221190).

2621320 is an abundant number, since it is smaller than the sum of its proper divisors (3821060).

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

2621320 is a wasteful number, since it uses less digits than its factorization.

2621320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 91 counting only the distinct ones).

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

The square root of 2621320 is about 1619.0491036408. The cubic root of 2621320 is about 137.8817161898.

Adding to 2621320 its reverse (231262), we get a palindrome (2852582).

The spelling of 2621320 in words is "two million, six hundred twenty-one thousand, three hundred twenty".