31878248346 has 96 divisors (see below), whose sum is σ = 81013046400. Its totient is φ = 8871327360.

The previous prime is 31878248257. The next prime is 31878248453. The reversal of 31878248346 is 64384287813.

31878248346 is a `hidden beast` number, since 3 + 1 + 87 + 82 + 483 + 4 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 31878248292 and 31878248301.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 790636 + ... + 829976.

It is an arithmetic number, because the mean of its divisors is an integer number (843885900).

Almost surely, 2^31878248346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31878248346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40506523200).

31878248346 is an abundant number, since it is smaller than the sum of its proper divisors (49134798054).

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

31878248346 is a wasteful number, since it uses less digits than its factorization.

31878248346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39524 (or 39521 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The spelling of 31878248346 in words is "thirty-one billion, eight hundred seventy-eight million, two hundred forty-eight thousand, three hundred forty-six".