440006464644 has 48 divisors (see below), whose sum is σ = 1088443808256. Its totient is φ = 138101414400.

The previous prime is 440006464633. The next prime is 440006464673. The reversal of 440006464644 is 446464600044.

It is a junction number, because it is equal to n+sod(n) for n = 440006464596 and 440006464605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15970197 + ... + 15997724.

It is an arithmetic number, because the mean of its divisors is an integer number (22675912672).

Almost surely, 2^440006464644 is an apocalyptic number.

It is an amenable number.

440006464644 is an abundant number, since it is smaller than the sum of its proper divisors (648437343612).

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

440006464644 is a wasteful number, since it uses less digits than its factorization.

440006464644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31967996 (or 31967994 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 42.

The spelling of 440006464644 in words is "four hundred forty billion, six million, four hundred sixty-four thousand, six hundred forty-four".