31986748 has 6 divisors (see below), whose sum is σ = 55976816. Its totient is φ = 15993372.

The previous prime is 31986727. The next prime is 31986769. The reversal of 31986748 is 84768913.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31986727) and next prime (31986769).

It is a junction number, because it is equal to n+sod(n) for n = 31986698 and 31986707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3998340 + ... + 3998347.

Almost surely, 2^31986748 is an apocalyptic number.

It is an amenable number.

31986748 is a deficient number, since it is larger than the sum of its proper divisors (23990068).

31986748 is a wasteful number, since it uses less digits than its factorization.

31986748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7996691 (or 7996689 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 31986748 is about 5655.6828058158. The cubic root of 31986748 is about 317.4363788451.

The spelling of 31986748 in words is "thirty-one million, nine hundred eighty-six thousand, seven hundred forty-eight".