490452809 has 18 divisors (see below), whose sum is σ = 627115482. Its totient is φ = 382166400.

The previous prime is 490452799. The next prime is 490452827. The reversal of 490452809 is 908254094.

It can be written as a sum of positive squares in only one way, i.e., 338670409 + 151782400 = 18403^2 + 12320^2 .

It is a de Polignac number, because none of the positive numbers 2^k-490452809 is a prime.

It is a super-3 number, since 3×490452809³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (490452509) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35432 + ... + 47289.

It is an arithmetic number, because the mean of its divisors is an integer number (34839749).

Almost surely, 2^490452809 is an apocalyptic number.

490452809 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

490452809 is a deficient number, since it is larger than the sum of its proper divisors (136662673).

490452809 is a wasteful number, since it uses less digits than its factorization.

490452809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82757 (or 82739 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 490452809 is about 22146.1691721164. The cubic root of 490452809 is about 788.6162868666.

The spelling of 490452809 in words is "four hundred ninety million, four hundred fifty-two thousand, eight hundred nine".