28420565055 has 32 divisors (see below), whose sum is σ = 45721082880. Its totient is φ = 15075102720.

The previous prime is 28420565053. The next prime is 28420565111. The reversal of 28420565055 is 55056502482.

It is a Cunningham number, because it is equal to 168584²-1.

It is not a de Polignac number, because 28420565055 - 2¹ = 28420565053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28420564998 and 28420565016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28420565053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2523126 + ... + 2534364.

It is an arithmetic number, because the mean of its divisors is an integer number (1428783840).

Almost surely, 2^28420565055 is an apocalyptic number.

28420565055 is a deficient number, since it is larger than the sum of its proper divisors (17300517825).

28420565055 is a wasteful number, since it uses less digits than its factorization.

28420565055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12151.

The product of its (nonzero) digits is 480000, while the sum is 42.

The spelling of 28420565055 in words is "twenty-eight billion, four hundred twenty million, five hundred sixty-five thousand, fifty-five".