31248396 has 48 divisors (see below), whose sum is σ = 83002080. Its totient is φ = 10160640.

The previous prime is 31248379. The next prime is 31248419. The reversal of 31248396 is 69384213.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 31248396.

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 in 15 ways as a sum of consecutive naturals, for example, 900 + ... + 7956.

It is an arithmetic number, because the mean of its divisors is an integer number (1729210).

Almost surely, 2^31248396 is an apocalyptic number.

31248396 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31248396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41501040).

31248396 is an abundant number, since it is smaller than the sum of its proper divisors (51753684).

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

31248396 is a wasteful number, since it uses less digits than its factorization.

31248396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7111 (or 7103 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 31248396 is about 5590.0264757870. The cubic root of 31248396 is about 314.9748732792.

The spelling of 31248396 in words is "thirty-one million, two hundred forty-eight thousand, three hundred ninety-six".