28121260278 has 8 divisors (see below), whose sum is σ = 56242520568. Its totient is φ = 9373753424.

The previous prime is 28121260267. The next prime is 28121260393. The reversal of 28121260278 is 87206212182.

It is a sphenic number, since it is the product of 3 distinct primes.

28121260278 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2343438351 + ... + 2343438362.

It is an arithmetic number, because the mean of its divisors is an integer number (7030315071).

Almost surely, 2^28121260278 is an apocalyptic number.

28121260278 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28121260278 is a wasteful number, since it uses less digits than its factorization.

28121260278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686876718.

The product of its (nonzero) digits is 43008, while the sum is 39.

The spelling of 28121260278 in words is "twenty-eight billion, one hundred twenty-one million, two hundred sixty thousand, two hundred seventy-eight".