490885891 has 4 divisors (see below), whose sum is σ = 491706000. Its totient is φ = 490065784.

The previous prime is 490885883. The next prime is 490885921. The reversal of 490885891 is 198588094.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 490885891 - 2³ = 490885883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490885091) 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, 409156 + ... + 410353.

It is an arithmetic number, because the mean of its divisors is an integer number (122926500).

Almost surely, 2^490885891 is an apocalyptic number.

490885891 is a deficient number, since it is larger than the sum of its proper divisors (820109).

490885891 is an equidigital number, since it uses as much as digits as its factorization.

490885891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820108.

The product of its (nonzero) digits is 829440, while the sum is 52.

The square root of 490885891 is about 22155.9448230041. The cubic root of 490885891 is about 788.8483411599.

The spelling of 490885891 in words is "four hundred ninety million, eight hundred eighty-five thousand, eight hundred ninety-one".