28258255505 has 8 divisors (see below), whose sum is σ = 33918431400. Its totient is φ = 22600921216.

The previous prime is 28258255483. The next prime is 28258255583. The reversal of 28258255505 is 50555285282.

It can be written as a sum of positive squares in 4 ways, for example, as 3410092816 + 24848162689 = 58396^2 + 157633^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28258255505 - 2¹⁰ = 28258254481 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28258255505.

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, 688460 + ... + 728349.

It is an arithmetic number, because the mean of its divisors is an integer number (4239803925).

Almost surely, 2^28258255505 is an apocalyptic number.

It is an amenable number.

28258255505 is a deficient number, since it is larger than the sum of its proper divisors (5660175895).

28258255505 is a wasteful number, since it uses less digits than its factorization.

28258255505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420803.

The product of its (nonzero) digits is 1600000, while the sum is 47.

The spelling of 28258255505 in words is "twenty-eight billion, two hundred fifty-eight million, two hundred fifty-five thousand, five hundred five".