806638831 has 8 divisors (see below), whose sum is σ = 865789344. Its totient is φ = 748788480.

The previous prime is 806638801. The next prime is 806638843. The reversal of 806638831 is 138836608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 806638831 - 2²⁷ = 672421103 is a prime.

It is a super-2 number, since 2×806638831² = 1301332407354093122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806638801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323755 + ... + 326236.

It is an arithmetic number, because the mean of its divisors is an integer number (108223668).

Almost surely, 2^806638831 is an apocalyptic number.

806638831 is a deficient number, since it is larger than the sum of its proper divisors (59150513).

806638831 is a wasteful number, since it uses less digits than its factorization.

806638831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650081.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 806638831 is about 28401.3878358083. The cubic root of 806638831 is about 930.8785896888.

The spelling of 806638831 in words is "eight hundred six million, six hundred thirty-eight thousand, eight hundred thirty-one".