491675238 has 64 divisors (see below), whose sum is σ = 1114713600. Its totient is φ = 160613280.

The previous prime is 491675237. The next prime is 491675243. The reversal of 491675238 is 832576194.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 491675193 and 491675202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491675237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 605853 + ... + 606663.

It is an arithmetic number, because the mean of its divisors is an integer number (17417400).

Almost surely, 2^491675238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491675238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557356800).

491675238 is an abundant number, since it is smaller than the sum of its proper divisors (623038362).

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

491675238 is a wasteful number, since it uses less digits than its factorization.

491675238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034 (or 1028 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 491675238 is about 22173.7511035007. The cubic root of 491675238 is about 789.2709387709.

The spelling of 491675238 in words is "four hundred ninety-one million, six hundred seventy-five thousand, two hundred thirty-eight".