391238 has 16 divisors (see below), whose sum is σ = 640224. Its totient is φ = 178560.

The previous prime is 391231. The next prime is 391247. The reversal of 391238 is 832193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1103 + ... + 1413.

It is an arithmetic number, because the mean of its divisors is an integer number (40014).

2³⁹¹²³⁸ is an apocalyptic number.

391238 is a deficient number, since it is larger than the sum of its proper divisors (248986).

391238 is a wasteful number, since it uses less digits than its factorization.

391238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367.

The product of its digits is 1296, while the sum is 26.

The square root of 391238 is about 625.4902077571. The cubic root of 391238 is about 73.1386618251.

The spelling of 391238 in words is "three hundred ninety-one thousand, two hundred thirty-eight".