2621797120 has 144 divisors (see below), whose sum is σ = 6747064128. Its totient is φ = 972554240.

The previous prime is 2621797093. The next prime is 2621797121. The reversal of 2621797120 is 217971262.

It is a self number, because there is not a number n which added to its sum of digits gives 2621797120.

It is not an unprimeable number, because it can be changed into a prime (2621797121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1544112 + ... + 1545808.

It is an arithmetic number, because the mean of its divisors is an integer number (46854612).

Almost surely, 2^2621797120 is an apocalyptic number.

2621797120 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 2621797120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3373532064).

2621797120 is an abundant number, since it is smaller than the sum of its proper divisors (4125267008).

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

2621797120 is a wasteful number, since it uses less digits than its factorization.

2621797120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 2621797120 is about 51203.4873812321. The cubic root of 2621797120 is about 1378.9008120355.

The spelling of 2621797120 in words is "two billion, six hundred twenty-one million, seven hundred ninety-seven thousand, one hundred twenty".