440648865 has 24 divisors (see below), whose sum is σ = 765423360. Its totient is φ = 234510624.

The previous prime is 440648863. The next prime is 440648867. The reversal of 440648865 is 568846044.

It is an interprime number because it is at equal distance from previous prime (440648863) and next prime (440648867).

It is not a de Polignac number, because 440648865 - 2¹ = 440648863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 440648865.

It is not an unprimeable number, because it can be changed into a prime (440648861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11334 + ... + 31776.

It is an arithmetic number, because the mean of its divisors is an integer number (31892640).

Almost surely, 2^440648865 is an apocalyptic number.

440648865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

440648865 is a deficient number, since it is larger than the sum of its proper divisors (324774495).

440648865 is a wasteful number, since it uses less digits than its factorization.

440648865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20933 (or 20930 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The square root of 440648865 is about 20991.6379780140. The cubic root of 440648865 is about 760.9641877213.

The spelling of 440648865 in words is "four hundred forty million, six hundred forty-eight thousand, eight hundred sixty-five".