705988 has 6 divisors (see below), whose sum is σ = 1235486. Its totient is φ = 352992.

The previous prime is 705973. The next prime is 705989. The reversal of 705988 is 889507.

It can be written as a sum of positive squares in only one way, i.e., 669124 + 36864 = 818^2 + 192^2 .

It is a super-2 number, since 2×705988² = 996838112288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (705989) by changing a digit.

705988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 88245 + ... + 88252.

2⁷⁰⁵⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

705988 is a deficient number, since it is larger than the sum of its proper divisors (529498).

705988 is a wasteful number, since it uses less digits than its factorization.

705988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176501 (or 176499 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 705988 is about 840.2309206403. The cubic root of 705988 is about 89.0428611464.

The spelling of 705988 in words is "seven hundred five thousand, nine hundred eighty-eight".