28081739336 has 32 divisors (see below), whose sum is σ = 61801515840. Its totient is φ = 11709759168.

The previous prime is 28081739333. The next prime is 28081739341. The reversal of 28081739336 is 63393718082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28081739333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6774410 + ... + 6778553.

It is an arithmetic number, because the mean of its divisors is an integer number (1931297370).

Almost surely, 2^28081739336 is an apocalyptic number.

It is an amenable number.

28081739336 is an abundant number, since it is smaller than the sum of its proper divisors (33719776504).

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

28081739336 is a wasteful number, since it uses less digits than its factorization.

28081739336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13553013 (or 13553009 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 28081739336 in words is "twenty-eight billion, eighty-one million, seven hundred thirty-nine thousand, three hundred thirty-six".