28739207868 has 24 divisors (see below), whose sum is σ = 76637887872. Its totient is φ = 8211202224.

The previous prime is 28739207857. The next prime is 28739207869. The reversal of 28739207868 is 86870293782.

It is a super-2 number, since 2×28739207868² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28739207869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171066630 + ... + 171066797.

It is an arithmetic number, because the mean of its divisors is an integer number (3193245328).

Almost surely, 2^28739207868 is an apocalyptic number.

28739207868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28739207868 is an abundant number, since it is smaller than the sum of its proper divisors (47898680004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28739207868 is a wasteful number, since it uses less digits than its factorization.

28739207868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342133441 (or 342133439 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 28739207868 in words is "twenty-eight billion, seven hundred thirty-nine million, two hundred seven thousand, eight hundred sixty-eight".