4003640 has 32 divisors (see below), whose sum is σ = 9106560. Its totient is φ = 1584000.

The previous prime is 4003579. The next prime is 4003663. The reversal of 4003640 is 463004.

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, 3545 + ... + 4535.

It is an arithmetic number, because the mean of its divisors is an integer number (284580).

Almost surely, 2^4003640 is an apocalyptic number.

4003640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4003640 is an abundant number, since it is smaller than the sum of its proper divisors (5102920).

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

4003640 is a wasteful number, since it uses less digits than its factorization.

4003640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 4003640 is about 2000.9097930691. The cubic root of 4003640 is about 158.7882417636.

Adding to 4003640 its reverse (463004), we get a palindrome (4466644).

The spelling of 4003640 in words is "four million, three thousand, six hundred forty".