28288684907 has 16 divisors (see below), whose sum is σ = 34441532160. Its totient is φ = 22694491872.

The previous prime is 28288684903. The next prime is 28288684909. The reversal of 28288684907 is 70948688282.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28288684907 - 2² = 28288684903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28288684907.

It is not an unprimeable number, because it can be changed into a prime (28288684903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1270268 + ... + 1292345.

It is an arithmetic number, because the mean of its divisors is an integer number (2152595760).

Almost surely, 2^28288684907 is an apocalyptic number.

28288684907 is a deficient number, since it is larger than the sum of its proper divisors (6152847253).

28288684907 is a wasteful number, since it uses less digits than its factorization.

28288684907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562722.

The product of its (nonzero) digits is 24772608, while the sum is 62.

The spelling of 28288684907 in words is "twenty-eight billion, two hundred eighty-eight million, six hundred eighty-four thousand, nine hundred seven".