4004540 has 12 divisors (see below), whose sum is σ = 8409576. Its totient is φ = 1601808.

The previous prime is 4004527. The next prime is 4004579. The reversal of 4004540 is 454004.

It is a super-2 number, since 2×4004540² = 32072681223200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100094 + ... + 100133.

It is an arithmetic number, because the mean of its divisors is an integer number (700798).

Almost surely, 2^4004540 is an apocalyptic number.

It is an amenable number.

4004540 is an abundant number, since it is smaller than the sum of its proper divisors (4405036).

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

4004540 is a wasteful number, since it uses less digits than its factorization.

4004540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200236 (or 200234 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 4004540 is about 2001.1346781264. The cubic root of 4004540 is about 158.8001391628.

Adding to 4004540 its reverse (454004), we get a palindrome (4458544).

It can be divided in two parts, 4004 and 540, that multiplied together give a triangular number (2162160 = T₂₀₇₉).

The spelling of 4004540 in words is "four million, four thousand, five hundred forty".