695988 has 18 divisors (see below), whose sum is σ = 1759394. Its totient is φ = 231984.

The previous prime is 695939. The next prime is 695999. The reversal of 695988 is 889596.

It can be written as a sum of positive squares in only one way, i.e., 685584 + 10404 = 828^2 + 102^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×695988² = 968798592288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

695988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9631 + ... + 9702.

2⁶⁹⁵⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

695988 is an abundant number, since it is smaller than the sum of its proper divisors (1063406).

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

695988 is a wasteful number, since it uses less digits than its factorization.

695988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19343 (or 19338 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 695988 is about 834.2589526040. The cubic root of 695988 is about 88.6204431151.

The spelling of 695988 in words is "six hundred ninety-five thousand, nine hundred eighty-eight".