806402871 has 40 divisors (see below), whose sum is σ = 1280245824. Its totient is φ = 504092160.

The previous prime is 806402843. The next prime is 806402873. The reversal of 806402871 is 178204608.

806402871 is a `hidden beast` number, since 8 + 0 + 640 + 2 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 806402871 - 2⁷ = 806402743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806402873) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 430066 + ... + 431936.

Almost surely, 2^806402871 is an apocalyptic number.

806402871 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

806402871 is a deficient number, since it is larger than the sum of its proper divisors (473842953).

806402871 is a wasteful number, since it uses less digits than its factorization.

806402871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213 (or 2204 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 806402871 is about 28397.2335096220. The cubic root of 806402871 is about 930.7878131956.

The spelling of 806402871 in words is "eight hundred six million, four hundred two thousand, eight hundred seventy-one".