806812640 has 48 divisors (see below), whose sum is σ = 1942079328. Its totient is φ = 316632576.

The previous prime is 806812631. The next prime is 806812649. The reversal of 806812640 is 46218608.

806812640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (806812631) and next prime (806812649).

It is a self number, because there is not a number n which added to its sum of digits gives 806812640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806812649) 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, 39092 + ... + 56051.

It is an arithmetic number, because the mean of its divisors is an integer number (40459986).

Almost surely, 2^806812640 is an apocalyptic number.

806812640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

806812640 is an abundant number, since it is smaller than the sum of its proper divisors (1135266688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

806812640 is a wasteful number, since it uses less digits than its factorization.

806812640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95211 (or 95203 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 806812640 is about 28404.4475390739. The cubic root of 806812640 is about 930.9454446641.

The spelling of 806812640 in words is "eight hundred six million, eight hundred twelve thousand, six hundred forty".