440245665 has 64 divisors (see below), whose sum is σ = 816480000. Its totient is φ = 224792064.

The previous prime is 440245661. The next prime is 440245697. The reversal of 440245665 is 566542044.

It is not a de Polignac number, because 440245665 - 2² = 440245661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (440245661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 543781 + ... + 544589.

It is an arithmetic number, because the mean of its divisors is an integer number (12757500).

Almost surely, 2^440245665 is an apocalyptic number.

440245665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

440245665 is a deficient number, since it is larger than the sum of its proper divisors (376234335).

440245665 is a wasteful number, since it uses less digits than its factorization.

440245665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 440245665 is about 20982.0319559379. The cubic root of 440245665 is about 760.7320191972.

The spelling of 440245665 in words is "four hundred forty million, two hundred forty-five thousand, six hundred sixty-five".