4040240 has 20 divisors (see below), whose sum is σ = 9393744. Its totient is φ = 1616064.

The previous prime is 4040233. The next prime is 4040279. The reversal of 4040240 is 420404.

4040240 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25172 + ... + 25331.

Almost surely, 2^4040240 is an apocalyptic number.

4040240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4040240 is an abundant number, since it is smaller than the sum of its proper divisors (5353504).

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

4040240 is a wasteful number, since it uses less digits than its factorization.

4040240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50516 (or 50510 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 4040240 is about 2010.0348255690. The cubic root of 4040240 is about 159.2706385849.

Adding to 4040240 its reverse (420404), we get a palindrome (4460644).

The spelling of 4040240 in words is "four million, forty thousand, two hundred forty".