31320048 has 40 divisors (see below), whose sum is σ = 82637568. Its totient is φ = 10217152.

The previous prime is 31320041. The next prime is 31320049. The reversal of 31320048 is 84002313.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320041) 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 7 ways as a sum of consecutive naturals, for example, 4686 + ... + 9197.

Almost surely, 2^31320048 is an apocalyptic number.

It is an amenable number.

31320048 is an abundant number, since it is smaller than the sum of its proper divisors (51317520).

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

31320048 is a wasteful number, since it uses less digits than its factorization.

31320048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13941 (or 13935 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 31320048 is about 5596.4317203018. The cubic root of 31320048 is about 315.2154333790.

The spelling of 31320048 in words is "thirty-one million, three hundred twenty thousand, forty-eight".