806440747 has 8 divisors (see below), whose sum is σ = 975861216. Its totient is φ = 650573952.

The previous prime is 806440741. The next prime is 806440759. The reversal of 806440747 is 747044608.

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

It is not a de Polignac number, because 806440747 - 2²³ = 798052139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806440741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3388288 + ... + 3388525.

It is an arithmetic number, because the mean of its divisors is an integer number (121982652).

Almost surely, 2^806440747 is an apocalyptic number.

806440747 is a deficient number, since it is larger than the sum of its proper divisors (169420469).

806440747 is a wasteful number, since it uses less digits than its factorization.

806440747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776837.

The product of its (nonzero) digits is 150528, while the sum is 40.

The square root of 806440747 is about 28397.9003977407. The cubic root of 806440747 is about 930.8023857161.

The spelling of 806440747 in words is "eight hundred six million, four hundred forty thousand, seven hundred forty-seven".