31249783340 has 48 divisors (see below), whose sum is σ = 66405884160. Its totient is φ = 12351709440.

The previous prime is 31249783339. The next prime is 31249783349. The reversal of 31249783340 is 4338794213.

It is a junction number, because it is equal to n+sod(n) for n = 31249783291 and 31249783300.

It is not an unprimeable number, because it can be changed into a prime (31249783349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 793925 + ... + 832355.

It is an arithmetic number, because the mean of its divisors is an integer number (1383455920).

Almost surely, 2^31249783340 is an apocalyptic number.

It is an amenable number.

31249783340 is an abundant number, since it is smaller than the sum of its proper divisors (35156100820).

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

31249783340 is a wasteful number, since it uses less digits than its factorization.

31249783340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38922 (or 38920 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 31249783340 in words is "thirty-one billion, two hundred forty-nine million, seven hundred eighty-three thousand, three hundred forty".