4243440 has 40 divisors (see below), whose sum is σ = 13155408. Its totient is φ = 1131520.

The previous prime is 4243439. The next prime is 4243453. The reversal of 4243440 is 443424.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8601 + ... + 9080.

Almost surely, 2^4243440 is an apocalyptic number.

4243440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4243440 is an abundant number, since it is smaller than the sum of its proper divisors (8911968).

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

4243440 is a wasteful number, since it uses less digits than its factorization.

4243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17697 (or 17691 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 4243440 is about 2059.9611646825. The cubic root of 4243440 is about 161.8972065459.

Adding to 4243440 its reverse (443424), we get a palindrome (4686864).

The spelling of 4243440 in words is "four million, two hundred forty-three thousand, four hundred forty".