31334440040 has 64 divisors (see below), whose sum is σ = 71559936000. Its totient is φ = 12346836480.

The previous prime is 31334440021. The next prime is 31334440051. The reversal of 31334440040 is 4004443313.

It is a junction number, because it is equal to n+sod(n) for n = 31334439991 and 31334440009.

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, 948521 + ... + 980999.

It is an arithmetic number, because the mean of its divisors is an integer number (1118124000).

Almost surely, 2^31334440040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31334440040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35779968000).

31334440040 is an abundant number, since it is smaller than the sum of its proper divisors (40225495960).

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

31334440040 is a wasteful number, since it uses less digits than its factorization.

31334440040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32850 (or 32846 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 31334440040 its reverse (4004443313), we get a palindrome (35338883353).

The spelling of 31334440040 in words is "thirty-one billion, three hundred thirty-four million, four hundred forty thousand, forty".