491878210 has 8 divisors (see below), whose sum is σ = 885380796. Its totient is φ = 196751280.

The previous prime is 491878199. The next prime is 491878237. The reversal of 491878210 is 12878194.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 484924441 + 6953769 = 22021^2 + 2637^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24593901 + ... + 24593920.

Almost surely, 2^491878210 is an apocalyptic number.

491878210 is a deficient number, since it is larger than the sum of its proper divisors (393502586).

491878210 is a wasteful number, since it uses less digits than its factorization.

491878210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49187828.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 491878210 is about 22178.3274842807. The cubic root of 491878210 is about 789.3795320382.

The spelling of 491878210 in words is "four hundred ninety-one million, eight hundred seventy-eight thousand, two hundred ten".