31440424434 has 16 divisors (see below), whose sum is σ = 63911683200. Its totient is φ = 10308335760.

The previous prime is 31440424429. The next prime is 31440424453. The reversal of 31440424434 is 43442404413.

It is a junction number, because it is equal to n+sod(n) for n = 31440424395 and 31440424404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42951034 + ... + 42951765.

It is an arithmetic number, because the mean of its divisors is an integer number (3994480200).

Almost surely, 2^31440424434 is an apocalyptic number.

31440424434 is an abundant number, since it is smaller than the sum of its proper divisors (32471258766).

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

31440424434 is a wasteful number, since it uses less digits than its factorization.

31440424434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85902865.

The product of its (nonzero) digits is 73728, while the sum is 33.

Adding to 31440424434 its reverse (43442404413), we get a palindrome (74882828847).

The spelling of 31440424434 in words is "thirty-one billion, four hundred forty million, four hundred twenty-four thousand, four hundred thirty-four".