491858788 has 6 divisors (see below), whose sum is σ = 860752886. Its totient is φ = 245929392.

The previous prime is 491858771. The next prime is 491858813. The reversal of 491858788 is 887858194.

It can be written as a sum of positive squares in only one way, i.e., 351862564 + 139996224 = 18758^2 + 11832^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61482345 + ... + 61482352.

Almost surely, 2^491858788 is an apocalyptic number.

It is an amenable number.

491858788 is a deficient number, since it is larger than the sum of its proper divisors (368894098).

491858788 is a wasteful number, since it uses less digits than its factorization.

491858788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122964701 (or 122964699 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 58.

The square root of 491858788 is about 22177.8896200698. The cubic root of 491858788 is about 789.3691422501.

The spelling of 491858788 in words is "four hundred ninety-one million, eight hundred fifty-eight thousand, seven hundred eighty-eight".