2220240 has 120 divisors (see below), whose sum is σ = 7776288. Its totient is φ = 519680.

The previous prime is 2220209. The next prime is 2220263. The reversal of 2220240 is 420222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76546 + ... + 76574.

2^2220240 is an apocalyptic number.

2220240 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 2220240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3888144).

2220240 is an abundant number, since it is smaller than the sum of its proper divisors (5556048).

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

2220240 is a wasteful number, since it uses less digits than its factorization.

2220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 2220240 is about 1490.0469791252. The cubic root of 2220240 is about 130.4567758083.

Adding to 2220240 its reverse (420222), we get a palindrome (2640462).

The spelling of 2220240 in words is "two million, two hundred twenty thousand, two hundred forty".