808640247 has 16 divisors (see below), whose sum is σ = 1139823360. Its totient is φ = 508519872.

The previous prime is 808640243. The next prime is 808640249. The reversal of 808640247 is 742046808.

It is not a de Polignac number, because 808640247 - 2² = 808640243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808640243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17163 + ... + 43724.

It is an arithmetic number, because the mean of its divisors is an integer number (71238960).

Almost surely, 2^808640247 is an apocalyptic number.

808640247 is a deficient number, since it is larger than the sum of its proper divisors (331183113).

808640247 is a wasteful number, since it uses less digits than its factorization.

808640247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61142.

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 808640247 is about 28436.6004824768. The cubic root of 808640247 is about 931.6478462124.

The spelling of 808640247 in words is "eight hundred eight million, six hundred forty thousand, two hundred forty-seven".