491238 has 32 divisors (see below), whose sum is σ = 1192320. Its totient is φ = 148680.

The previous prime is 491219. The next prime is 491251. The reversal of 491238 is 832194.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

491238 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 15 ways as a sum of consecutive naturals, for example, 181 + ... + 1007.

It is an arithmetic number, because the mean of its divisors is an integer number (37260).

2⁴⁹¹²³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (596160).

491238 is an abundant number, since it is smaller than the sum of its proper divisors (701082).

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

491238 is a wasteful number, since it uses less digits than its factorization.

491238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849 (or 843 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 491238 is about 700.8837278750. The cubic root of 491238 is about 78.9036907872.

It can be divided in two parts, 4912 and 38, that added together give a triangular number (4950 = T₉₉).

The spelling of 491238 in words is "four hundred ninety-one thousand, two hundred thirty-eight".