694779216 has 80 divisors (see below), whose sum is σ = 1937554560. Its totient is φ = 213875200.

The previous prime is 694779209. The next prime is 694779227. The reversal of 694779216 is 612977496.

694779216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21166 + ... + 42866.

It is an arithmetic number, because the mean of its divisors is an integer number (24219432).

Almost surely, 2^694779216 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 694779216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968777280).

694779216 is an abundant number, since it is smaller than the sum of its proper divisors (1242775344).

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

694779216 is a wasteful number, since it uses less digits than its factorization.

694779216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21764 (or 21758 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 51.

The square root of 694779216 is about 26358.6649130793. The cubic root of 694779216 is about 885.6910839371.

The spelling of 694779216 in words is "six hundred ninety-four million, seven hundred seventy-nine thousand, two hundred sixteen".