28008057505 has 8 divisors (see below), whose sum is σ = 33797433600. Its totient is φ = 22281269616.

The previous prime is 28008057487. The next prime is 28008057527. The reversal of 28008057505 is 50575080082.

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 28008057505 - 2¹³ = 28008049313 is a prime.

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, 15646065 + ... + 15647854.

It is an arithmetic number, because the mean of its divisors is an integer number (4224679200).

Almost surely, 2^28008057505 is an apocalyptic number.

It is an amenable number.

28008057505 is a deficient number, since it is larger than the sum of its proper divisors (5789376095).

28008057505 is a wasteful number, since it uses less digits than its factorization.

28008057505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31294103.

The product of its (nonzero) digits is 112000, while the sum is 40.

The spelling of 28008057505 in words is "twenty-eight billion, eight million, fifty-seven thousand, five hundred five".