2247440 has 40 divisors (see below), whose sum is σ = 5629848. Its totient is φ = 829440.

The previous prime is 2247439. The next prime is 2247449. The reversal of 2247440 is 447422.

It can be written as a sum of positive squares in 4 ways, for example, as 80656 + 2166784 = 284^2 + 1472^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (2247449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41 + ... + 2120.

2^2247440 is an apocalyptic number.

2247440 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 2247440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2814924).

2247440 is an abundant number, since it is smaller than the sum of its proper divisors (3382408).

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

2247440 is a wasteful number, since it uses less digits than its factorization.

2247440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187 (or 2181 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 2247440 is about 1499.1464238026. The cubic root of 2247440 is about 130.9873538285.

The spelling of 2247440 in words is "two million, two hundred forty-seven thousand, four hundred forty".