28027800505 has 8 divisors (see below), whose sum is σ = 35403537600. Its totient is φ = 21242122416.

The previous prime is 28027800481. The next prime is 28027800511. The reversal of 28027800505 is 50500872082.

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 28027800505 - 2⁵ = 28027800473 is a prime.

It is a super-2 number, since 2×28027800505² (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 7 ways as a sum of consecutive naturals, for example, 147514645 + ... + 147514834.

It is an arithmetic number, because the mean of its divisors is an integer number (4425442200).

Almost surely, 2^28027800505 is an apocalyptic number.

It is an amenable number.

28027800505 is a deficient number, since it is larger than the sum of its proper divisors (7375737095).

28027800505 is a wasteful number, since it uses less digits than its factorization.

28027800505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295029503.

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 28027800505 in words is "twenty-eight billion, twenty-seven million, eight hundred thousand, five hundred five".