31426534240 has 24 divisors (see below), whose sum is σ = 74245187520. Its totient is φ = 12570613632.

The previous prime is 31426534229. The next prime is 31426534247. The reversal of 31426534240 is 4243562413.

It is a junction number, because it is equal to n+sod(n) for n = 31426534196 and 31426534205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31426534247) 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 3 ways as a sum of consecutive naturals, for example, 98207760 + ... + 98208079.

It is an arithmetic number, because the mean of its divisors is an integer number (3093549480).

Almost surely, 2^31426534240 is an apocalyptic number.

It is an amenable number.

31426534240 is an abundant number, since it is smaller than the sum of its proper divisors (42818653280).

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

31426534240 is a wasteful number, since it uses less digits than its factorization.

31426534240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196415854 (or 196415846 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

The spelling of 31426534240 in words is "thirty-one billion, four hundred twenty-six million, five hundred thirty-four thousand, two hundred forty".