391086248 has 48 divisors (see below), whose sum is σ = 871197120. Its totient is φ = 164034528.

The previous prime is 391086233. The next prime is 391086251. The reversal of 391086248 is 842680193.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7811 + ... + 29037.

It is an arithmetic number, because the mean of its divisors is an integer number (18149940).

Almost surely, 2^391086248 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 391086248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435598560).

391086248 is an abundant number, since it is smaller than the sum of its proper divisors (480110872).

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

391086248 is a wasteful number, since it uses less digits than its factorization.

391086248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21294 (or 21283 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 391086248 is about 19775.9006874529. The cubic root of 391086248 is about 731.2920434784.

The spelling of 391086248 in words is "three hundred ninety-one million, eighty-six thousand, two hundred forty-eight".