4402406640 has 40 divisors (see below), whose sum is σ = 13647461328. Its totient is φ = 1173975040.

The previous prime is 4402406623. The next prime is 4402406641. The reversal of 4402406640 is 466042044.

It is a tau number, because it is divible by the number of its divisors (40).

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 = 4402406598 and 4402406607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4402406641) 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, 9171441 + ... + 9171920.

Almost surely, 2^4402406640 is an apocalyptic number.

4402406640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4402406640 is an abundant number, since it is smaller than the sum of its proper divisors (9245054688).

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

4402406640 is a wasteful number, since it uses less digits than its factorization.

4402406640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18343377 (or 18343371 counting only the distinct ones).

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

The square root of 4402406640 is about 66350.6340587639. The cubic root of 4402406640 is about 1638.9412460420.

Adding to 4402406640 its reverse (466042044), we get a palindrome (4868448684).

The spelling of 4402406640 in words is "four billion, four hundred two million, four hundred six thousand, six hundred forty".