28285807755 has 16 divisors (see below), whose sum is σ = 45297836064. Its totient is φ = 15072249600.

The previous prime is 28285807733. The next prime is 28285807757. The reversal of 28285807755 is 55770858282.

It is not a de Polignac number, because 28285807755 - 2⁵ = 28285807723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28285807695 and 28285807704.

It is not an unprimeable number, because it can be changed into a prime (28285807757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 827346 + ... + 860855.

It is an arithmetic number, because the mean of its divisors is an integer number (2831114754).

Almost surely, 2^28285807755 is an apocalyptic number.

28285807755 is a deficient number, since it is larger than the sum of its proper divisors (17012028309).

28285807755 is a wasteful number, since it uses less digits than its factorization.

28285807755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689326.

The product of its (nonzero) digits is 12544000, while the sum is 57.

The spelling of 28285807755 in words is "twenty-eight billion, two hundred eighty-five million, eight hundred seven thousand, seven hundred fifty-five".