391046 has 8 divisors (see below), whose sum is σ = 612144. Its totient is φ = 187000.

The previous prime is 391031. The next prime is 391049. The reversal of 391046 is 640193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391049) by changing a digit.

391046 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 3 ways as a sum of consecutive naturals, for example, 4205 + ... + 4296.

It is an arithmetic number, because the mean of its divisors is an integer number (76518).

2³⁹¹⁰⁴⁶ is an apocalyptic number.

391046 is a deficient number, since it is larger than the sum of its proper divisors (221098).

391046 is a wasteful number, since it uses less digits than its factorization.

391046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8526.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 391046 is about 625.3367093015. The cubic root of 391046 is about 73.1266956044.

The spelling of 391046 in words is "three hundred ninety-one thousand, forty-six".