4442540 has 12 divisors (see below), whose sum is σ = 9329376. Its totient is φ = 1777008.

The previous prime is 4442531. The next prime is 4442549. The reversal of 4442540 is 452444.

It is an interprime number because it is at equal distance from previous prime (4442531) and next prime (4442549).

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4442549) by changing a digit.

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, 111044 + ... + 111083.

It is an arithmetic number, because the mean of its divisors is an integer number (777448).

Almost surely, 2^4442540 is an apocalyptic number.

It is an amenable number.

4442540 is an abundant number, since it is smaller than the sum of its proper divisors (4886836).

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

4442540 is a wasteful number, since it uses less digits than its factorization.

4442540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222136 (or 222134 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 4442540 is about 2107.7333797233. The cubic root of 4442540 is about 164.3906511142.

Adding to 4442540 its reverse (452444), we get a palindrome (4894984).

The spelling of 4442540 in words is "four million, four hundred forty-two thousand, five hundred forty".