444002540 has 24 divisors (see below), whose sum is σ = 937146672. Its totient is φ = 176697920.

The previous prime is 444002521. The next prime is 444002543. The reversal of 444002540 is 45200444.

It is not an unprimeable number, because it can be changed into a prime (444002543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52406 + ... + 60285.

It is an arithmetic number, because the mean of its divisors is an integer number (39047778).

Almost surely, 2^444002540 is an apocalyptic number.

It is an amenable number.

444002540 is an abundant number, since it is smaller than the sum of its proper divisors (493144132).

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

444002540 is a wasteful number, since it uses less digits than its factorization.

444002540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112897 (or 112895 counting only the distinct ones).

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

The square root of 444002540 is about 21071.3677771520. The cubic root of 444002540 is about 762.8898173396.

Adding to 444002540 its product of nonzero digits (2560), we get a triangular number (444005100 = T₂₉₇₉₉).

Adding to 444002540 its reverse (45200444), we get a palindrome (489202984).

The spelling of 444002540 in words is "four hundred forty-four million, two thousand, five hundred forty".