491893450 has 12 divisors (see below), whose sum is σ = 914921910. Its totient is φ = 196757360.

The previous prime is 491893427. The next prime is 491893463. The reversal of 491893450 is 54398194.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 296425089 + 195468361 = 17217^2 + 13981^2 .

It is a junction number, because it is equal to n+sod(n) for n = 491893397 and 491893406.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4918885 + ... + 4918984.

Almost surely, 2^491893450 is an apocalyptic number.

491893450 is a deficient number, since it is larger than the sum of its proper divisors (423028460).

491893450 is a wasteful number, since it uses less digits than its factorization.

491893450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9837881 (or 9837876 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 491893450 is about 22178.6710602777. The cubic root of 491893450 is about 789.3876844762.

The spelling of 491893450 in words is "four hundred ninety-one million, eight hundred ninety-three thousand, four hundred fifty".