31284378426 has 64 divisors (see below), whose sum is σ = 72813984768. Its totient is φ = 8776366848.

The previous prime is 31284378403. The next prime is 31284378457. The reversal of 31284378426 is 62487348213.

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 31 ways as a sum of consecutive naturals, for example, 540690 + ... + 595746.

It is an arithmetic number, because the mean of its divisors is an integer number (1137718512).

Almost surely, 2^31284378426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31284378426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36406992384).

31284378426 is an abundant number, since it is smaller than the sum of its proper divisors (41529606342).

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

31284378426 is a wasteful number, since it uses less digits than its factorization.

31284378426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55315.

The product of its digits is 1548288, while the sum is 48.

The spelling of 31284378426 in words is "thirty-one billion, two hundred eighty-four million, three hundred seventy-eight thousand, four hundred twenty-six".