705428305 has 4 divisors (see below), whose sum is σ = 846513972. Its totient is φ = 564342640.

The previous prime is 705428293. The next prime is 705428309. The reversal of 705428305 is 503824507.

It is a happy number.

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 355850496 + 349577809 = 18864^2 + 18697^2 .

It is not a de Polignac number, because 705428305 - 2¹³ = 705420113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705428309) 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, 70542826 + ... + 70542835.

It is an arithmetic number, because the mean of its divisors is an integer number (211628493).

Almost surely, 2^705428305 is an apocalyptic number.

It is an amenable number.

705428305 is a deficient number, since it is larger than the sum of its proper divisors (141085667).

705428305 is a wasteful number, since it uses less digits than its factorization.

705428305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141085666.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 705428305 is about 26559.9003198431. The cubic root of 705428305 is about 890.1932438188.

The spelling of 705428305 in words is "seven hundred five million, four hundred twenty-eight thousand, three hundred five".