4240440 has 48 divisors (see below), whose sum is σ = 13782600. Its totient is φ = 1130688.

The previous prime is 4240433. The next prime is 4240447. The reversal of 4240440 is 440424.

It is a happy number.

4240440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4240433) and next prime (4240447).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5530 + ... + 6249.

Almost surely, 2^4240440 is an apocalyptic number.

4240440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4240440 is an abundant number, since it is smaller than the sum of its proper divisors (9542160).

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

4240440 is a wasteful number, since it uses less digits than its factorization.

4240440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11796 (or 11789 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 4240440 is about 2059.2328668706. The cubic root of 4240440 is about 161.8590452018.

Adding to 4240440 its reverse (440424), we get a palindrome (4680864).

The spelling of 4240440 in words is "four million, two hundred forty thousand, four hundred forty".