806505238 has 32 divisors (see below), whose sum is σ = 1556932608. Its totient is φ = 304084800.

The previous prime is 806505229. The next prime is 806505247. The reversal of 806505238 is 832505608.

It is an interprime number because it is at equal distance from previous prime (806505229) and next prime (806505247).

It is a super-4 number, since 4×806505238⁴ (a number of 37 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 806505197 and 806505206.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 79695 + ... + 89242.

It is an arithmetic number, because the mean of its divisors is an integer number (48654144).

Almost surely, 2^806505238 is an apocalyptic number.

806505238 is a deficient number, since it is larger than the sum of its proper divisors (750427370).

806505238 is a wasteful number, since it uses less digits than its factorization.

806505238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168988.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 806505238 is about 28399.0358639162. The cubic root of 806505238 is about 930.8271971181.

The spelling of 806505238 in words is "eight hundred six million, five hundred five thousand, two hundred thirty-eight".