705690 has 24 divisors (see below), whose sum is σ = 1835028. Its totient is φ = 188160.

The previous prime is 705689. The next prime is 705713. The reversal of 705690 is 96507.

It can be written as a sum of positive squares in 2 ways, for example, as 690561 + 15129 = 831^2 + 123^2 .

It is a super-2 number, since 2×705690² = 995996752200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3831 + ... + 4010.

2⁷⁰⁵⁶⁹⁰ is an apocalyptic number.

705690 is an abundant number, since it is smaller than the sum of its proper divisors (1129338).

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

705690 is a wasteful number, since it uses less digits than its factorization.

705690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7854 (or 7851 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 705690 is about 840.0535697204. The cubic root of 705690 is about 89.0303309490.

The spelling of 705690 in words is "seven hundred five thousand, six hundred ninety".