31886868336 has 320 divisors, whose sum is σ = 91794124800. Its totient is φ = 9509068800.

The previous prime is 31886868323. The next prime is 31886868341. The reversal of 31886868336 is 63386868813.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 31886868336.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 118538410 + ... + 118538678.

It is an arithmetic number, because the mean of its divisors is an integer number (286856640).

Almost surely, 2^31886868336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31886868336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45897062400).

31886868336 is an abundant number, since it is smaller than the sum of its proper divisors (59907256464).

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

31886868336 is a wasteful number, since it uses less digits than its factorization.

31886868336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 442 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 60.

The spelling of 31886868336 in words is "thirty-one billion, eight hundred eighty-six million, eight hundred sixty-eight thousand, three hundred thirty-six".