440260004640 has 48 divisors (see below), whose sum is σ = 1386819016128. Its totient is φ = 117402667776.

The previous prime is 440260004633. The next prime is 440260004641. The reversal of 440260004640 is 46400062044.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×440260004640² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 440260004598 and 440260004607.

It is not an unprimeable number, because it can be changed into a prime (440260004641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458603692 + ... + 458604651.

It is an arithmetic number, because the mean of its divisors is an integer number (28892062836).

Almost surely, 2^440260004640 is an apocalyptic number.

440260004640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

440260004640 is an abundant number, since it is smaller than the sum of its proper divisors (946559011488).

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

440260004640 is a wasteful number, since it uses less digits than its factorization.

440260004640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917208361 (or 917208353 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 440260004640 its reverse (46400062044), we get a palindrome (486660066684).

The spelling of 440260004640 in words is "four hundred forty billion, two hundred sixty million, four thousand, six hundred forty".