491169028 has 24 divisors (see below), whose sum is σ = 982860032. Its totient is φ = 210389184.

The previous prime is 491168999. The next prime is 491169037. The reversal of 491169028 is 820961194.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69925 + ... + 76627.

Almost surely, 2^491169028 is an apocalyptic number.

It is an amenable number.

491169028 is an abundant number, since it is smaller than the sum of its proper divisors (491691004).

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

491169028 is a wasteful number, since it uses less digits than its factorization.

491169028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9331 (or 9329 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 491169028 is about 22162.3335413941. Note that the first 3 decimals coincide. The cubic root of 491169028 is about 788.9999780463. Note that the first 4 decimals are identical.

The spelling of 491169028 in words is "four hundred ninety-one million, one hundred sixty-nine thousand, twenty-eight".