2220040 has 16 divisors (see below), whose sum is σ = 4995180. Its totient is φ = 888000.

The previous prime is 2220007. The next prime is 2220041. The reversal of 2220040 is 400222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2196324 + 23716 = 1482^2 + 154^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2219999 and 2220026.

It is not an unprimeable number, because it can be changed into a prime (2220041) 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, 27711 + ... + 27790.

2^2220040 is an apocalyptic number.

2220040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2220040 is an abundant number, since it is smaller than the sum of its proper divisors (2775140).

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

2220040 is a wasteful number, since it uses less digits than its factorization.

2220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55512 (or 55508 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 2220040 is about 1489.9798656358. The cubic root of 2220040 is about 130.4528584933.

Adding to 2220040 its reverse (400222), we get a palindrome (2620262).

The spelling of 2220040 in words is "two million, two hundred twenty thousand, forty".