696620728 has 8 divisors (see below), whose sum is σ = 1306163880. Its totient is φ = 348310360.

The previous prime is 696620707. The next prime is 696620737. The reversal of 696620728 is 827026696.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43538788 + ... + 43538803.

It is an arithmetic number, because the mean of its divisors is an integer number (163270485).

Almost surely, 2^696620728 is an apocalyptic number.

It is an amenable number.

696620728 is a deficient number, since it is larger than the sum of its proper divisors (609543152).

696620728 is a wasteful number, since it uses less digits than its factorization.

696620728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87077597 (or 87077593 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 696620728 is about 26393.5736117715. The cubic root of 696620728 is about 886.4729015477.

The spelling of 696620728 in words is "six hundred ninety-six million, six hundred twenty thousand, seven hundred twenty-eight".