2817220 has 24 divisors (see below), whose sum is σ = 6761664. Its totient is φ = 965856.

The previous prime is 2817211. The next prime is 2817229. The reversal of 2817220 is 227182.

2817220 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2817211) and next prime (2817229).

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

2817220 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 2817191 and 2817200.

It is not an unprimeable number, because it can be changed into a prime (2817229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9922 + ... + 10201.

It is an arithmetic number, because the mean of its divisors is an integer number (281736).

2^2817220 is an apocalyptic number.

2817220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2817220 is an abundant number, since it is smaller than the sum of its proper divisors (3944444).

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

2817220 is a wasteful number, since it uses less digits than its factorization.

2817220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20139 (or 20137 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 2817220 is about 1678.4576253215. The cubic root of 2817220 is about 141.2343235794.

The spelling of 2817220 in words is "two million, eight hundred seventeen thousand, two hundred twenty".