491975830 has 8 divisors (see below), whose sum is σ = 885556512. Its totient is φ = 196790328.

The previous prime is 491975761. The next prime is 491975831. The reversal of 491975830 is 38579194.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491975831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24598782 + ... + 24598801.

It is an arithmetic number, because the mean of its divisors is an integer number (110694564).

Almost surely, 2^491975830 is an apocalyptic number.

491975830 is a deficient number, since it is larger than the sum of its proper divisors (393580682).

491975830 is a wasteful number, since it uses less digits than its factorization.

491975830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49197590.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 491975830 is about 22180.5281722505. The cubic root of 491975830 is about 789.4317496611.

The spelling of 491975830 in words is "four hundred ninety-one million, nine hundred seventy-five thousand, eight hundred thirty".