31886648 has 16 divisors (see below), whose sum is σ = 62387280. Its totient is φ = 15250048.

The previous prime is 31886641. The next prime is 31886681. The reversal of 31886648 is 84668813.

It is a junction number, because it is equal to n+sod(n) for n = 31886599 and 31886608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31886641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86465 + ... + 86832.

It is an arithmetic number, because the mean of its divisors is an integer number (3899205).

Almost surely, 2^31886648 is an apocalyptic number.

It is an amenable number.

31886648 is a deficient number, since it is larger than the sum of its proper divisors (30500632).

31886648 is a wasteful number, since it uses less digits than its factorization.

31886648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173326 (or 173322 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 31886648 is about 5646.8263653135. The cubic root of 31886648 is about 317.1049021405.

The spelling of 31886648 in words is "thirty-one million, eight hundred eighty-six thousand, six hundred forty-eight".