538646805 has 24 divisors (see below), whose sum is σ = 936863928. Its totient is φ = 286290816.

The previous prime is 538646803. The next prime is 538646863. The reversal of 538646805 is 508646835.

It can be written as a sum of positive squares in 4 ways, for example, as 359140401 + 179506404 = 18951^2 + 13398^2 .

It is not a de Polignac number, because 538646805 - 2¹ = 538646803 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538646803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7242 + ... + 33611.

It is an arithmetic number, because the mean of its divisors is an integer number (39035997).

Almost surely, 2^538646805 is an apocalyptic number.

It is an amenable number.

538646805 is a deficient number, since it is larger than the sum of its proper divisors (398217123).

538646805 is a wasteful number, since it uses less digits than its factorization.

538646805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41157 (or 41154 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 538646805 is about 23208.7656931600. The cubic root of 538646805 is about 813.6445055680.

The spelling of 538646805 in words is "five hundred thirty-eight million, six hundred forty-six thousand, eight hundred five".