440445140 has 12 divisors (see below), whose sum is σ = 924934836. Its totient is φ = 176178048.

The previous prime is 440445139. The next prime is 440445157. The reversal of 440445140 is 41544044.

It can be written as a sum of positive squares in 2 ways, for example, as 310393924 + 130051216 = 17618^2 + 11404^2 .

It is a congruent number.

It is an unprimeable number.

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, 11011109 + ... + 11011148.

It is an arithmetic number, because the mean of its divisors is an integer number (77077903).

Almost surely, 2^440445140 is an apocalyptic number.

It is an amenable number.

440445140 is an abundant number, since it is smaller than the sum of its proper divisors (484489696).

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

440445140 is a wasteful number, since it uses less digits than its factorization.

440445140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22022266 (or 22022264 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 440445140 is about 20986.7848895442. The cubic root of 440445140 is about 760.8468975621.

Adding to 440445140 its reverse (41544044), we get a palindrome (481989184).

The spelling of 440445140 in words is "four hundred forty million, four hundred forty-five thousand, one hundred forty".