440013155 has 16 divisors (see below), whose sum is σ = 539180064. Its totient is φ = 344597760.

The previous prime is 440013151. The next prime is 440013157. The reversal of 440013155 is 551310044.

It is not a de Polignac number, because 440013155 - 2² = 440013151 is a prime.

It is a super-2 number, since 2×440013155² = 387223153146108050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 440013155.

It is not an unprimeable number, because it can be changed into a prime (440013151) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 136472 + ... + 139658.

It is an arithmetic number, because the mean of its divisors is an integer number (33698754).

Almost surely, 2^440013155 is an apocalyptic number.

440013155 is a deficient number, since it is larger than the sum of its proper divisors (99166909).

440013155 is a wasteful number, since it uses less digits than its factorization.

440013155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 440013155 is about 20976.4905310683. The cubic root of 440013155 is about 760.5980720524.

Adding to 440013155 its reverse (551310044), we get a palindrome (991323199).

The spelling of 440013155 in words is "four hundred forty million, thirteen thousand, one hundred fifty-five".