31878248442 has 8 divisors (see below), whose sum is σ = 63756496896. Its totient is φ = 10626082812.

The previous prime is 31878248257. The next prime is 31878248453. The reversal of 31878248442 is 24484287813.

It is a sphenic number, since it is the product of 3 distinct primes.

31878248442 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 2656520698 + ... + 2656520709.

It is an arithmetic number, because the mean of its divisors is an integer number (7969562112).

Almost surely, 2^31878248442 is an apocalyptic number.

31878248442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31878248442 is a wasteful number, since it uses less digits than its factorization.

31878248442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313041412.

The product of its digits is 2752512, while the sum is 51.

The spelling of 31878248442 in words is "thirty-one billion, eight hundred seventy-eight million, two hundred forty-eight thousand, four hundred forty-two".