706428805 has 4 divisors (see below), whose sum is σ = 847714572. Its totient is φ = 565143040.

The previous prime is 706428799. The next prime is 706428809. The reversal of 706428805 is 508824607.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 447830244 + 258598561 = 21162^2 + 16081^2 .

It is not a de Polignac number, because 706428805 - 2⁵ = 706428773 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706428809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70642876 + ... + 70642885.

It is an arithmetic number, because the mean of its divisors is an integer number (211928643).

Almost surely, 2^706428805 is an apocalyptic number.

It is an amenable number.

706428805 is a deficient number, since it is larger than the sum of its proper divisors (141285767).

706428805 is a wasteful number, since it uses less digits than its factorization.

706428805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141285766.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 706428805 is about 26578.7284308336. The cubic root of 706428805 is about 890.6138949349.

The spelling of 706428805 in words is "seven hundred six million, four hundred twenty-eight thousand, eight hundred five".