490949865 has 72 divisors (see below), whose sum is σ = 1008832968. Its totient is φ = 220147200.

The previous prime is 490949839. The next prime is 490949909. The reversal of 490949865 is 568949094.

490949865 is a `hidden beast` number, since 4 + 90 + 9 + 498 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13046544 + 477903321 = 3612^2 + 21861^2 .

It is not a de Polignac number, because 490949865 - 2⁶ = 490949801 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 114765 + ... + 118965.

It is an arithmetic number, because the mean of its divisors is an integer number (14011569).

Almost surely, 2^490949865 is an apocalyptic number.

490949865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

490949865 is an abundant number, since it is smaller than the sum of its proper divisors (517883103).

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

490949865 is a wasteful number, since it uses less digits than its factorization.

490949865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4279 (or 4269 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 490949865 is about 22157.3884968423. The cubic root of 490949865 is about 788.8826081810.

The spelling of 490949865 in words is "four hundred ninety million, nine hundred forty-nine thousand, eight hundred sixty-five".