31306288940 has 24 divisors (see below), whose sum is σ = 66346360080. Its totient is φ = 12407629248.

The previous prime is 31306288939. The next prime is 31306288997. The reversal of 31306288940 is 4988260313.

It is a junction number, because it is equal to n+sod(n) for n = 31306288891 and 31306288900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7178162 + ... + 7182521.

It is an arithmetic number, because the mean of its divisors is an integer number (2764431670).

Almost surely, 2^31306288940 is an apocalyptic number.

It is an amenable number.

31306288940 is an abundant number, since it is smaller than the sum of its proper divisors (35040071140).

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

31306288940 is a wasteful number, since it uses less digits than its factorization.

31306288940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14360801 (or 14360799 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 31306288940 in words is "thirty-one billion, three hundred six million, two hundred eighty-eight thousand, nine hundred forty".