391862 has 4 divisors (see below), whose sum is σ = 587796. Its totient is φ = 195930.

The previous prime is 391861. The next prime is 391873. The reversal of 391862 is 268193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 268193 = 269 ⋅997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391861) 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 as a sum of consecutive naturals, namely, 97964 + ... + 97967.

It is an arithmetic number, because the mean of its divisors is an integer number (146949).

2³⁹¹⁸⁶² is an apocalyptic number.

391862 is a deficient number, since it is larger than the sum of its proper divisors (195934).

391862 is a wasteful number, since it uses less digits than its factorization.

391862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195933.

The product of its digits is 2592, while the sum is 29.

The square root of 391862 is about 625.9888177915. The cubic root of 391862 is about 73.1775250260.

The spelling of 391862 in words is "three hundred ninety-one thousand, eight hundred sixty-two".