491763238 has 4 divisors (see below), whose sum is σ = 737644860. Its totient is φ = 245881618.

The previous prime is 491763221. The next prime is 491763269. The reversal of 491763238 is 832367194.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 491763194 and 491763203.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 122940808 + ... + 122940811.

It is an arithmetic number, because the mean of its divisors is an integer number (184411215).

Almost surely, 2^491763238 is an apocalyptic number.

491763238 is a deficient number, since it is larger than the sum of its proper divisors (245881622).

491763238 is a wasteful number, since it uses less digits than its factorization.

491763238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245881621.

The product of its digits is 217728, while the sum is 43.

The square root of 491763238 is about 22175.7353429373. The cubic root of 491763238 is about 789.3180238479.

The spelling of 491763238 in words is "four hundred ninety-one million, seven hundred sixty-three thousand, two hundred thirty-eight".