4243640 has 32 divisors (see below), whose sum is σ = 9607680. Its totient is φ = 1686912.

The previous prime is 4243639. The next prime is 4243649. The reversal of 4243640 is 463424.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243649) 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, 10889 + ... + 11271.

It is an arithmetic number, because the mean of its divisors is an integer number (300240).

Almost surely, 2^4243640 is an apocalyptic number.

4243640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4243640 is an abundant number, since it is smaller than the sum of its proper divisors (5364040).

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

4243640 is a wasteful number, since it uses less digits than its factorization.

4243640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 4243640 is about 2060.0097087150. The cubic root of 4243640 is about 161.8997499959.

The spelling of 4243640 in words is "four million, two hundred forty-three thousand, six hundred forty".