2917220 has 12 divisors (see below), whose sum is σ = 6126204. Its totient is φ = 1166880.

The previous prime is 2917219. The next prime is 2917223. The reversal of 2917220 is 227192.

It can be written as a sum of positive squares in 2 ways, for example, as 732736 + 2184484 = 856^2 + 1478^2 .

It is not an unprimeable number, because it can be changed into a prime (2917223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72911 + ... + 72950.

It is an arithmetic number, because the mean of its divisors is an integer number (510517).

2^2917220 is an apocalyptic number.

2917220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2917220 is an abundant number, since it is smaller than the sum of its proper divisors (3208984).

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

2917220 is a wasteful number, since it uses less digits than its factorization.

2917220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145870 (or 145868 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 2917220 is about 1707.9871193894. The cubic root of 2917220 is about 142.8860160687.

It can be divided in two parts, 29172 and 20, that added together give a palindrome (29192).

The spelling of 2917220 in words is "two million, nine hundred seventeen thousand, two hundred twenty".