491636260 has 24 divisors (see below), whose sum is σ = 1093168440. Its totient is φ = 185086464.

The previous prime is 491636231. The next prime is 491636261. The reversal of 491636260 is 62636194.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 165328164 + 326308096 = 12858^2 + 18064^2 .

It is not an unprimeable number, because it can be changed into a prime (491636261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722655 + ... + 723334.

It is an arithmetic number, because the mean of its divisors is an integer number (45548685).

Almost surely, 2^491636260 is an apocalyptic number.

It is an amenable number.

491636260 is an abundant number, since it is smaller than the sum of its proper divisors (601532180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491636260 is a wasteful number, since it uses less digits than its factorization.

491636260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446015 (or 1446013 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 491636260 is about 22172.8721639755. The cubic root of 491636260 is about 789.2500814968.

The spelling of 491636260 in words is "four hundred ninety-one million, six hundred thirty-six thousand, two hundred sixty".