2240040 has 64 divisors (see below), whose sum is σ = 7335360. Its totient is φ = 542720.

The previous prime is 2240027. The next prime is 2240057. The reversal of 2240040 is 400422.

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 junction number, because it is equal to n+sod(n) for n = 2239998 and 2240025.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472 + ... + 2168.

It is an arithmetic number, because the mean of its divisors is an integer number (114615).

2^2240040 is an apocalyptic number.

2240040 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 2240040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3667680).

2240040 is an abundant number, since it is smaller than the sum of its proper divisors (5095320).

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

2240040 is a wasteful number, since it uses less digits than its factorization.

2240040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722 (or 1718 counting only the distinct ones).

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

The square root of 2240040 is about 1496.6763177120. The cubic root of 2240040 is about 130.8434312282.

Adding to 2240040 its reverse (400422), we get a palindrome (2640462).

It can be divided in two parts, 2 and 240040, that added together give a palindrome (240042).

The spelling of 2240040 in words is "two million, two hundred forty thousand, forty".