696640428 has 72 divisors (see below), whose sum is σ = 1924715520. Its totient is φ = 210699360.

The previous prime is 696640423. The next prime is 696640429. The reversal of 696640428 is 824046696.

696640428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (696640421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254853 + ... + 257571.

It is an arithmetic number, because the mean of its divisors is an integer number (26732160).

Almost surely, 2^696640428 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 696640428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962357760).

696640428 is an abundant number, since it is smaller than the sum of its proper divisors (1228075092).

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

696640428 is a wasteful number, since it uses less digits than its factorization.

696640428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387 (or 3382 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 696640428 is about 26393.9468060387. The cubic root of 696640428 is about 886.4812577693.

The spelling of 696640428 in words is "six hundred ninety-six million, six hundred forty thousand, four hundred twenty-eight".