2657223820 has 48 divisors (see below), whose sum is σ = 5790224160. Its totient is φ = 1023473664.

The previous prime is 2657223791. The next prime is 2657223827. The reversal of 2657223820 is 283227562.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 2657223820.

It is not an unprimeable number, because it can be changed into a prime (2657223827) 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, 53271 + ... + 90289.

It is an arithmetic number, because the mean of its divisors is an integer number (120629670).

Almost surely, 2^2657223820 is an apocalyptic number.

2657223820 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 2657223820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2895112080).

2657223820 is an abundant number, since it is smaller than the sum of its proper divisors (3133000340).

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

2657223820 is a wasteful number, since it uses less digits than its factorization.

2657223820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37162 (or 37160 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 2657223820 is about 51548.2668961819. The cubic root of 2657223820 is about 1385.0837868047.

The spelling of 2657223820 in words is "two billion, six hundred fifty-seven million, two hundred twenty-three thousand, eight hundred twenty".