391960 has 32 divisors (see below), whose sum is σ = 907200. Its totient is φ = 152320.

The previous prime is 391939. The next prime is 391961. The reversal of 391960 is 69193.

It is a happy number.

It is a plaindrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391961) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1521 + ... + 1759.

It is an arithmetic number, because the mean of its divisors is an integer number (28350).

2³⁹¹⁹⁶⁰ 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 391960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453600).

391960 is an abundant number, since it is smaller than the sum of its proper divisors (515240).

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

391960 is a wasteful number, since it uses less digits than its factorization.

391960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 391960 is about 626.0670890568. The cubic root of 391960 is about 73.1836247922.

The spelling of 391960 in words is "three hundred ninety-one thousand, nine hundred sixty".