391107882 has 64 divisors (see below), whose sum is σ = 920709504. Its totient is φ = 109424640.

The previous prime is 391107859. The next prime is 391107887. The reversal of 391107882 is 288701193.

It is a self number, because there is not a number n which added to its sum of digits gives 391107882.

It is not an unprimeable number, because it can be changed into a prime (391107887) 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 31 ways as a sum of consecutive naturals, for example, 56178 + ... + 62754.

It is an arithmetic number, because the mean of its divisors is an integer number (14386086).

Almost surely, 2^391107882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391107882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (460354752).

391107882 is an abundant number, since it is smaller than the sum of its proper divisors (529601622).

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

391107882 is a wasteful number, since it uses less digits than its factorization.

391107882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6663.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 391107882 is about 19776.4476587682. The cubic root of 391107882 is about 731.3055276995.

The spelling of 391107882 in words is "three hundred ninety-one million, one hundred seven thousand, eight hundred eighty-two".