28208239288 has 32 divisors (see below), whose sum is σ = 54158572800. Its totient is φ = 13767540192.

The previous prime is 28208239277. The next prime is 28208239289. The reversal of 28208239288 is 88293280282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28208239289) 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 7 ways as a sum of consecutive naturals, for example, 43531 + ... + 241477.

It is an arithmetic number, because the mean of its divisors is an integer number (1692455400).

Almost surely, 2^28208239288 is an apocalyptic number.

It is an amenable number.

28208239288 is a deficient number, since it is larger than the sum of its proper divisors (25950333512).

28208239288 is a wasteful number, since it uses less digits than its factorization.

28208239288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198379 (or 198375 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 52.

The spelling of 28208239288 in words is "twenty-eight billion, two hundred eight million, two hundred thirty-nine thousand, two hundred eighty-eight".