391068 has 60 divisors (see below), whose sum is σ = 1097712. Its totient is φ = 120960.

The previous prime is 391067. The next prime is 391073. The reversal of 391068 is 860193.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391063) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 5473 + ... + 5543.

2³⁹¹⁰⁶⁸ 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 391068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (548856).

391068 is an abundant number, since it is smaller than the sum of its proper divisors (706644).

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

391068 is a wasteful number, since it uses less digits than its factorization.

391068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 391068 is about 625.3542995774. The cubic root of 391068 is about 73.1280669325.

The spelling of 391068 in words is "three hundred ninety-one thousand, sixty-eight".