28939350488 has 8 divisors (see below), whose sum is σ = 54261282180. Its totient is φ = 14469675240.

The previous prime is 28939350481. The next prime is 28939350541. The reversal of 28939350488 is 88405393982.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28939350481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1808709398 + ... + 1808709413.

Almost surely, 2^28939350488 is an apocalyptic number.

It is an amenable number.

28939350488 is a deficient number, since it is larger than the sum of its proper divisors (25321931692).

28939350488 is a wasteful number, since it uses less digits than its factorization.

28939350488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617418817 (or 3617418813 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 59.

The spelling of 28939350488 in words is "twenty-eight billion, nine hundred thirty-nine million, three hundred fifty thousand, four hundred eighty-eight".