491500402 has 8 divisors (see below), whose sum is σ = 744014700. Its totient is φ = 243495504.

The previous prime is 491500369. The next prime is 491500403. The reversal of 491500402 is 204005194.

It can be written as a sum of positive squares in 2 ways, for example, as 473019001 + 18481401 = 21749^2 + 4299^2 .

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

It is not an unprimeable number, because it can be changed into a prime (491500403) 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 3 ways as a sum of consecutive naturals, for example, 1127077 + ... + 1127512.

Almost surely, 2^491500402 is an apocalyptic number.

491500402 is a deficient number, since it is larger than the sum of its proper divisors (252514298).

491500402 is a wasteful number, since it uses less digits than its factorization.

491500402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254700.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 491500402 is about 22169.8083437814. The cubic root of 491500402 is about 789.1773747522.

Adding to 491500402 its reverse (204005194), we get a palindrome (695505596).

The spelling of 491500402 in words is "four hundred ninety-one million, five hundred thousand, four hundred two".