697856 has 40 divisors (see below), whose sum is σ = 1473120. Its totient is φ = 329728.

The previous prime is 697831. The next prime is 697877. The reversal of 697856 is 658796.

It is a happy number.

697856 is nontrivially palindromic in base 7.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

697856 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 in 3 ways as a sum of consecutive naturals, for example, 14825 + ... + 14871.

It is an arithmetic number, because the mean of its divisors is an integer number (36828).

2⁶⁹⁷⁸⁵⁶ 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 697856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (736560).

697856 is an abundant number, since it is smaller than the sum of its proper divisors (775264).

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

697856 is an equidigital number, since it uses as much as digits as its factorization.

697856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 78 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 697856 is about 835.3777588612. The cubic root of 697856 is about 88.6996566959.

Subtracting from 697856 its reverse (658796), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 697856 in words is "six hundred ninety-seven thousand, eight hundred fifty-six".