697216 has 32 divisors (see below), whose sum is σ = 1499400. Its totient is φ = 321024.

The previous prime is 697211. The next prime is 697217. The reversal of 697216 is 612796.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×697216² = 972220301312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697211) 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 3 ways as a sum of consecutive naturals, for example, 1455 + ... + 1873.

2⁶⁹⁷²¹⁶ 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 697216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749700).

697216 is an abundant number, since it is smaller than the sum of its proper divisors (802184).

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

697216 is a wasteful number, since it uses less digits than its factorization.

697216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 434 counting only the distinct ones).

The product of its digits is 4536, while the sum is 31.

The square root of 697216 is about 834.9946107611. The cubic root of 697216 is about 88.6725330758.

The spelling of 697216 in words is "six hundred ninety-seven thousand, two hundred sixteen".