69630728 has 8 divisors (see below), whose sum is σ = 130557630. Its totient is φ = 34815360.

The previous prime is 69630727. The next prime is 69630749. The reversal of 69630728 is 82703696.

It can be written as a sum of positive squares in only one way, i.e., 50951044 + 18679684 = 7138^2 + 4322^2 .

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

It is not an unprimeable number, because it can be changed into a prime (69630721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4351913 + ... + 4351928.

Almost surely, 2^69630728 is an apocalyptic number.

It is an amenable number.

69630728 is a deficient number, since it is larger than the sum of its proper divisors (60926902).

69630728 is a wasteful number, since it uses less digits than its factorization.

69630728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8703847 (or 8703843 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 69630728 is about 8344.5028611655. The cubic root of 69630728 is about 411.4025493812.

The spelling of 69630728 in words is "sixty-nine million, six hundred thirty thousand, seven hundred twenty-eight".