28061277798 has 16 divisors (see below), whose sum is σ = 56126767536. Its totient is φ = 9353057280.

The previous prime is 28061277793. The next prime is 28061277809. The reversal of 28061277798 is 89777216082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28061277791) 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, 85323 + ... + 251798.

It is an arithmetic number, because the mean of its divisors is an integer number (3507922971).

Almost surely, 2^28061277798 is an apocalyptic number.

28061277798 is an abundant number, since it is smaller than the sum of its proper divisors (28065489738).

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

28061277798 is a wasteful number, since it uses less digits than its factorization.

28061277798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350999.

The product of its (nonzero) digits is 4741632, while the sum is 57.

The spelling of 28061277798 in words is "twenty-eight billion, sixty-one million, two hundred seventy-seven thousand, seven hundred ninety-eight".