697648 has 20 divisors (see below), whose sum is σ = 1545040. Its totient is φ = 298944.

The previous prime is 697643. The next prime is 697673. The reversal of 697648 is 846796.

It is an Ulam number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 697648.

It is not an unprimeable number, because it can be changed into a prime (697643) by changing a digit.

697648 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, 3003 + ... + 3226.

It is an arithmetic number, because the mean of its divisors is an integer number (77252).

2⁶⁹⁷⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

697648 is an abundant number, since it is smaller than the sum of its proper divisors (847392).

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

697648 is a wasteful number, since it uses less digits than its factorization.

697648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6244 (or 6238 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 697648 is about 835.2532550071. The cubic root of 697648 is about 88.6908433390.

The spelling of 697648 in words is "six hundred ninety-seven thousand, six hundred forty-eight".