31422440440 has 32 divisors (see below), whose sum is σ = 71095482000. Its totient is φ = 12498755584.

The previous prime is 31422440417. The next prime is 31422440453. The reversal of 31422440440 is 4404422413.

It is a junction number, because it is equal to n+sod(n) for n = 31422440399 and 31422440408.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2187145 + ... + 2201464.

Almost surely, 2^31422440440 is an apocalyptic number.

It is an amenable number.

31422440440 is an abundant number, since it is smaller than the sum of its proper divisors (39673041560).

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

31422440440 is a wasteful number, since it uses less digits than its factorization.

31422440440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4388799 (or 4388795 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 31422440440 its reverse (4404422413), we get a palindrome (35826862853).

The spelling of 31422440440 in words is "thirty-one billion, four hundred twenty-two million, four hundred forty thousand, four hundred forty".