2042440 has 16 divisors (see below), whose sum is σ = 4595580. Its totient is φ = 816960.

The previous prime is 2042429. The next prime is 2042449. The reversal of 2042440 is 442402.

It can be written as a sum of positive squares in 2 ways, for example, as 1726596 + 315844 = 1314^2 + 562^2 .

It is a super-2 number, since 2×2042440² = 8343122307200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2042449) 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, 25491 + ... + 25570.

2^2042440 is an apocalyptic number.

2042440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2042440 is an abundant number, since it is smaller than the sum of its proper divisors (2553140).

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

2042440 is a wasteful number, since it uses less digits than its factorization.

2042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51072 (or 51068 counting only the distinct ones).

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

The square root of 2042440 is about 1429.1396012986. The cubic root of 2042440 is about 126.8770587806.

Adding to 2042440 its reverse (442402), we get a palindrome (2484842).

The spelling of 2042440 in words is "two million, forty-two thousand, four hundred forty".