31987848 has 64 divisors (see below), whose sum is σ = 84188160. Its totient is φ = 10108736.

The previous prime is 31987847. The next prime is 31987861. The reversal of 31987848 is 84878913.

It is a super-2 number, since 2×31987848² = 2046444839342208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31987797 and 31987806.

It is not an unprimeable number, because it can be changed into a prime (31987847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92011 + ... + 92357.

It is an arithmetic number, because the mean of its divisors is an integer number (1315440).

Almost surely, 2^31987848 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 31987848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42094080).

31987848 is an abundant number, since it is smaller than the sum of its proper divisors (52200312).

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

31987848 is a wasteful number, since it uses less digits than its factorization.

31987848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546 (or 542 counting only the distinct ones).

The product of its digits is 387072, while the sum is 48.

The square root of 31987848 is about 5655.7800523005. The cubic root of 31987848 is about 317.4400176022.

The spelling of 31987848 in words is "thirty-one million, nine hundred eighty-seven thousand, eight hundred forty-eight".