2402440 has 32 divisors (see below), whose sum is σ = 5725080. Its totient is φ = 904192.

The previous prime is 2402431. The next prime is 2402441. The reversal of 2402440 is 442042.

It can be written as a sum of positive squares in 4 ways, for example, as 2353156 + 49284 = 1534^2 + 222^2 .

It is not an unprimeable number, because it can be changed into a prime (2402441) 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, 1087 + ... + 2446.

2^2402440 is an apocalyptic number.

2402440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2402440 is an abundant number, since it is smaller than the sum of its proper divisors (3322640).

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

2402440 is a wasteful number, since it uses less digits than its factorization.

2402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561 (or 3557 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 2402440 is about 1549.9806450404. The cubic root of 2402440 is about 133.9319473265.

Adding to 2402440 its reverse (442042), we get a palindrome (2844482).

The spelling of 2402440 in words is "two million, four hundred two thousand, four hundred forty".