It is a Jordan-Polya number, since it can be written as 6! ⋅ 5! ⋅ (2!)3.
It is an unprimeable number.
2691200 is an apocalyptic number.
691200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 691200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1269140).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
691200 is a wasteful number, since it uses less digits than its factorization.
691200 is an odious number, because the sum of its binary digits is odd.
The square root of 691200 is about 831.3843876331. The cubic root of 691200 is about 88.4167559674.
Multiplying 691200 by its product of nonzero digits (108), we get a square (74649600 = 86402).
691200 divided by its product of nonzero digits (108) gives a square (6400 = 802).
Adding to 691200 its reverse (2196), we get a palindrome (693396).
The spelling of 691200 in words is "six hundred ninety-one thousand, two hundred".