691360 has 48 divisors (see below), whose sum is σ = 1701000. Its totient is φ = 265216.

The previous prime is 691349. The next prime is 691363. The reversal of 691360 is 63196.

It can be written as a sum of positive squares in 4 ways, for example, as 425104 + 266256 = 652^2 + 516^2 .

It is not an unprimeable number, because it can be changed into a prime (691363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4566 + ... + 4714.

2⁶⁹¹³⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850500).

691360 is an abundant number, since it is smaller than the sum of its proper divisors (1009640).

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

691360 is a wasteful number, since it uses less digits than its factorization.

691360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 691360 is about 831.4806071100. The cubic root of 691360 is about 88.4235777216.

The spelling of 691360 in words is "six hundred ninety-one thousand, three hundred sixty".