28255525305 has 32 divisors (see below), whose sum is σ = 51740256000. Its totient is φ = 12898559232.

The previous prime is 28255525297. The next prime is 28255525387. The reversal of 28255525305 is 50352555282.

It is not a de Polignac number, because 28255525305 - 2³ = 28255525297 is a prime.

It is a super-2 number, since 2×28255525305² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115330 + ... + 264219.

It is an arithmetic number, because the mean of its divisors is an integer number (1616883000).

Almost surely, 2^28255525305 is an apocalyptic number.

It is an amenable number.

28255525305 is a deficient number, since it is larger than the sum of its proper divisors (23484730695).

28255525305 is a wasteful number, since it uses less digits than its factorization.

28255525305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380273.

The product of its (nonzero) digits is 600000, while the sum is 42.

The spelling of 28255525305 in words is "twenty-eight billion, two hundred fifty-five million, five hundred twenty-five thousand, three hundred five".