2620644200 has 48 divisors (see below), whose sum is σ = 6119256780. Its totient is φ = 1043740160.

The previous prime is 2620644199. The next prime is 2620644203. The reversal of 2620644200 is 24460262.

It can be written as a sum of positive squares in 6 ways, for example, as 615933124 + 2004711076 = 24818^2 + 44774^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2620644200.

It is not an unprimeable number, because it can be changed into a prime (2620644203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18482 + ... + 74718.

Almost surely, 2^2620644200 is an apocalyptic number.

2620644200 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 2620644200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3059628390).

2620644200 is an abundant number, since it is smaller than the sum of its proper divisors (3498612580).

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

2620644200 is a wasteful number, since it uses less digits than its factorization.

2620644200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56486 (or 56477 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 2620644200 is about 51192.2279257311. The cubic root of 2620644200 is about 1378.6986612031.

The spelling of 2620644200 in words is "two billion, six hundred twenty million, six hundred forty-four thousand, two hundred".