2604321720 has 960 divisors, whose sum is σ = 12004090560. Its totient is φ = 492687360.

The previous prime is 2604321689. The next prime is 2604321721. The reversal of 2604321720 is 271234062.

2604321720 is a `hidden beast` number, since 2 + 60 + 432 + 172 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2604321721) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 35675604 + ... + 35675676.

It is an arithmetic number, because the mean of its divisors is an integer number (12504261).

Almost surely, 2^2604321720 is an apocalyptic number.

2604321720 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 2604321720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6002045280).

2604321720 is an abundant number, since it is smaller than the sum of its proper divisors (9399768840).

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

2604321720 is a wasteful number, since it uses less digits than its factorization.

2604321720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 2604321720 is about 51032.5554915683. Note that the first 3 decimals coincide. The cubic root of 2604321720 is about 1375.8303251549.

Adding to 2604321720 its reverse (271234062), we get a palindrome (2875555782).

The spelling of 2604321720 in words is "two billion, six hundred four million, three hundred twenty-one thousand, seven hundred twenty".