694656 has 80 divisors (see below), whose sum is σ = 2098140. Its totient is φ = 228096.

The previous prime is 694651. The next prime is 694717. The reversal of 694656 is 656496.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (38880) is a multiple of the sum of its prime divisors (72).

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 694656.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 694656.

It is not an unprimeable number, because it can be changed into a prime (694651) by changing a digit.

694656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 9 ways as a sum of consecutive naturals, for example, 10335 + ... + 10401.

2⁶⁹⁴⁶⁵⁶ 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 694656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1049070).

694656 is an abundant number, since it is smaller than the sum of its proper divisors (1403484).

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

694656 is an equidigital number, since it uses as much as digits as its factorization.

694656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 72 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 694656 is about 833.4602570009. The cubic root of 694656 is about 88.5638723052.

The spelling of 694656 in words is "six hundred ninety-four thousand, six hundred fifty-six".