491942228 has 6 divisors (see below), whose sum is σ = 860898906. Its totient is φ = 245971112.

The previous prime is 491942221. The next prime is 491942251. The reversal of 491942228 is 822249194.

It can be written as a sum of positive squares in only one way, i.e., 433389124 + 58553104 = 20818^2 + 7652^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491942221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61492775 + ... + 61492782.

It is an arithmetic number, because the mean of its divisors is an integer number (143483151).

Almost surely, 2^491942228 is an apocalyptic number.

It is an amenable number.

491942228 is a deficient number, since it is larger than the sum of its proper divisors (368956678).

491942228 is a wasteful number, since it uses less digits than its factorization.

491942228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122985561 (or 122985559 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 491942228 is about 22179.7706931339. The cubic root of 491942228 is about 789.4137764952.

The spelling of 491942228 in words is "four hundred ninety-one million, nine hundred forty-two thousand, two hundred twenty-eight".