31483139688 has 768 divisors, whose sum is σ = 122401843200. Its totient is φ = 7039457280.

The previous prime is 31483139687. The next prime is 31483139693. The reversal of 31483139688 is 88693138413.

31483139688 is a `hidden beast` number, since 3 + 148 + 31 + 396 + 88 = 666.

It is a super-2 number, since 2×31483139688² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (31483139687) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 113657406 + ... + 113657682.

It is an arithmetic number, because the mean of its divisors is an integer number (159377400).

Almost surely, 2^31483139688 is an apocalyptic number.

31483139688 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31483139688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61200921600).

31483139688 is an abundant number, since it is smaller than the sum of its proper divisors (90918703512).

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

31483139688 is a wasteful number, since it uses less digits than its factorization.

31483139688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 415 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

It can be divided in two parts, 31483 and 139688, that added together give a palindrome (171171).

The spelling of 31483139688 in words is "thirty-one billion, four hundred eighty-three million, one hundred thirty-nine thousand, six hundred eighty-eight".