485138809 has 12 divisors (see below), whose sum is σ = 531989248. Its totient is φ = 441864000.

The previous prime is 485138803. The next prime is 485138821. The reversal of 485138809 is 908831584.

It is not a de Polignac number, because 485138809 - 2⁵ = 485138777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (485138803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18117 + ... + 36034.

Almost surely, 2^485138809 is an apocalyptic number.

It is an amenable number.

485138809 is a deficient number, since it is larger than the sum of its proper divisors (46850439).

485138809 is a wasteful number, since it uses less digits than its factorization.

485138809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54216 (or 54199 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 485138809 is about 22025.8668160869. The cubic root of 485138809 is about 785.7577488543.

It can be divided in two parts, 4851 and 38809, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 485138809 in words is "four hundred eighty-five million, one hundred thirty-eight thousand, eight hundred nine".