444551540 has 12 divisors (see below), whose sum is σ = 933558276. Its totient is φ = 177820608.

The previous prime is 444551539. The next prime is 444551557. The reversal of 444551540 is 45155444.

It can be written as a sum of positive squares in 2 ways, for example, as 229401316 + 215150224 = 15146^2 + 14668^2 .

It is a junction number, because it is equal to n+sod(n) for n = 444551497 and 444551506.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11113769 + ... + 11113808.

It is an arithmetic number, because the mean of its divisors is an integer number (77796523).

Almost surely, 2^444551540 is an apocalyptic number.

It is an amenable number.

444551540 is an abundant number, since it is smaller than the sum of its proper divisors (489006736).

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

444551540 is a wasteful number, since it uses less digits than its factorization.

444551540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22227586 (or 22227584 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 444551540 is about 21084.3909089165. The cubic root of 444551540 is about 763.2041203500.

The spelling of 444551540 in words is "four hundred forty-four million, five hundred fifty-one thousand, five hundred forty".