806694644 has 18 divisors (see below), whose sum is σ = 1642200210. Its totient is φ = 345726192.

The previous prime is 806694641. The next prime is 806694649. The reversal of 806694644 is 446496608.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 749116900 + 57577744 = 27370^2 + 7588^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806694641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2057699 + ... + 2058090.

It is an arithmetic number, because the mean of its divisors is an integer number (91233345).

Almost surely, 2^806694644 is an apocalyptic number.

It is an amenable number.

806694644 is an abundant number, since it is smaller than the sum of its proper divisors (835505566).

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

806694644 is a wasteful number, since it uses less digits than its factorization.

806694644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115807 (or 4115798 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 47.

The square root of 806694644 is about 28402.3703940358. The cubic root of 806694644 is about 930.9000589951.

The spelling of 806694644 in words is "eight hundred six million, six hundred ninety-four thousand, six hundred forty-four".