31387448 has 16 divisors (see below), whose sum is σ = 59962680. Its totient is φ = 15397408.

The previous prime is 31387441. The next prime is 31387453. The reversal of 31387448 is 84478313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31387441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36590 + ... + 37437.

Almost surely, 2^31387448 is an apocalyptic number.

It is an amenable number.

31387448 is a deficient number, since it is larger than the sum of its proper divisors (28575232).

31387448 is a wasteful number, since it uses less digits than its factorization.

31387448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74086 (or 74082 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 31387448 is about 5602.4501782702. The cubic root of 31387448 is about 315.4413834207.

The spelling of 31387448 in words is "thirty-one million, three hundred eighty-seven thousand, four hundred forty-eight".