391080 has 32 divisors (see below), whose sum is σ = 1173600. Its totient is φ = 104256.

The previous prime is 391073. The next prime is 391103. The reversal of 391080 is 80193.

It is an unprimeable number.

391080 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1510 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (36675).

2³⁹¹⁰⁸⁰ is an apocalyptic number.

391080 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

391080 is an abundant number, since it is smaller than the sum of its proper divisors (782520).

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

391080 is a wasteful number, since it uses less digits than its factorization.

391080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273 (or 3269 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 391080 is about 625.3638940649. The cubic root of 391080 is about 73.1288149080.

The spelling of 391080 in words is "three hundred ninety-one thousand, eighty".