31384248 has 64 divisors (see below), whose sum is σ = 90720000. Its totient is φ = 8861952.

The previous prime is 31384231. The next prime is 31384271. The reversal of 31384248 is 84248313.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13903 + ... + 16001.

It is an arithmetic number, because the mean of its divisors is an integer number (1417500).

Almost surely, 2^31384248 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 31384248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45360000).

31384248 is an abundant number, since it is smaller than the sum of its proper divisors (59335752).

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

31384248 is a wasteful number, since it uses less digits than its factorization.

31384248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204 (or 2200 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 31384248 is about 5602.1645816595. The cubic root of 31384248 is about 315.4306631403.

The spelling of 31384248 in words is "thirty-one million, three hundred eighty-four thousand, two hundred forty-eight".