31838423868 has 96 divisors (see below), whose sum is σ = 83046600000. Its totient is φ = 10548375552.

The previous prime is 31838423863. The next prime is 31838423873. The reversal of 31838423868 is 86832483813.

31838423868 is a `hidden beast` number, since 3 + 183 + 84 + 2 + 386 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (31838423863) and next prime (31838423873).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31838423863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25490508 + ... + 25491756.

It is an arithmetic number, because the mean of its divisors is an integer number (865068750).

Almost surely, 2^31838423868 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 31838423868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41523300000).

31838423868 is an abundant number, since it is smaller than the sum of its proper divisors (51208176132).

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

31838423868 is a wasteful number, since it uses less digits than its factorization.

31838423868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508 (or 2500 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The spelling of 31838423868 in words is "thirty-one billion, eight hundred thirty-eight million, four hundred twenty-three thousand, eight hundred sixty-eight".