28261388855060 has 24 divisors (see below), whose sum is σ = 59691973924296. Its totient is φ = 11239211288960.

The previous prime is 28261388855041. The next prime is 28261388855111. The reversal of 28261388855060 is 6055888316282.

It can be written as a sum of positive squares in 4 ways, for example, as 2588642873476 + 25672745981584 = 1608926^2 + 5066828^2 .

It is a super-2 number, since 2×28261388855060² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28261388854984 and 28261388855002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4084012271 + ... + 4084019190.

It is an arithmetic number, because the mean of its divisors is an integer number (2487165580179).

Almost surely, 2^{28261388855060} is an apocalyptic number.

28261388855060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28261388855060 is an abundant number, since it is smaller than the sum of its proper divisors (31430585069236).

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

28261388855060 is a wasteful number, since it uses less digits than its factorization.

28261388855060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8168031643 (or 8168031641 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 62.

The spelling of 28261388855060 in words is "twenty-eight trillion, two hundred sixty-one billion, three hundred eighty-eight million, eight hundred fifty-five thousand, sixty".