391048 has 16 divisors (see below), whose sum is σ = 838080. Its totient is φ = 167568.

The previous prime is 391031. The next prime is 391049. The reversal of 391048 is 840193.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (391049) 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 3 ways as a sum of consecutive naturals, for example, 3436 + ... + 3547.

It is an arithmetic number, because the mean of its divisors is an integer number (52380).

2³⁹¹⁰⁴⁸ is an apocalyptic number.

It is an amenable number.

391048 is an abundant number, since it is smaller than the sum of its proper divisors (447032).

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

391048 is a wasteful number, since it uses less digits than its factorization.

391048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996 (or 6992 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 391048 is about 625.3383084379. The cubic root of 391048 is about 73.1268202727.

The spelling of 391048 in words is "three hundred ninety-one thousand, forty-eight".