705423728 has 20 divisors (see below), whose sum is σ = 1369105080. Its totient is φ = 352106304.

The previous prime is 705423727. The next prime is 705423743. The reversal of 705423728 is 827324507.

It is a junction number, because it is equal to n+sod(n) for n = 705423691 and 705423700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705423727) 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, 28163 + ... + 46946.

It is an arithmetic number, because the mean of its divisors is an integer number (68455254).

Almost surely, 2^705423728 is an apocalyptic number.

It is an amenable number.

705423728 is a deficient number, since it is larger than the sum of its proper divisors (663681352).

705423728 is a wasteful number, since it uses less digits than its factorization.

705423728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75704 (or 75698 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 705423728 is about 26559.8141559763. The cubic root of 705423728 is about 890.1913185471.

The spelling of 705423728 in words is "seven hundred five million, four hundred twenty-three thousand, seven hundred twenty-eight".