491800228 has 12 divisors (see below), whose sum is σ = 861985152. Its totient is φ = 245518760.

The previous prime is 491800219. The next prime is 491800229. The reversal of 491800228 is 822008194.

It is a junction number, because it is equal to n+sod(n) for n = 491800193 and 491800202.

It is not an unprimeable number, because it can be changed into a prime (491800229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92428 + ... + 97603.

It is an arithmetic number, because the mean of its divisors is an integer number (71832096).

Almost surely, 2^491800228 is an apocalyptic number.

It is an amenable number.

491800228 is a deficient number, since it is larger than the sum of its proper divisors (370184924).

491800228 is a wasteful number, since it uses less digits than its factorization.

491800228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190682 (or 190680 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 491800228 is about 22176.5693469481. The cubic root of 491800228 is about 789.3378139551.

The spelling of 491800228 in words is "four hundred ninety-one million, eight hundred thousand, two hundred twenty-eight".