2621304 has 72 divisors (see below), whose sum is σ = 8269560. Its totient is φ = 747936.

The previous prime is 2621303. The next prime is 2621309. The reversal of 2621304 is 4031262.

It is a happy number.

2621304 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621303) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3157 + ... + 3899.

It is an arithmetic number, because the mean of its divisors is an integer number (114855).

2^2621304 is an apocalyptic number.

2621304 is a gapful number since it is divisible by the number (24) 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 2621304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4134780).

2621304 is an abundant number, since it is smaller than the sum of its proper divisors (5648256).

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

2621304 is a wasteful number, since it uses less digits than its factorization.

2621304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2621304 is about 1619.0441624613. The cubic root of 2621304 is about 137.8814356553.

Adding to 2621304 its reverse (4031262), we get a palindrome (6652566).

The spelling of 2621304 in words is "two million, six hundred twenty-one thousand, three hundred four".