28058206815 has 20 divisors (see below), whose sum is σ = 50296934424. Its totient is φ = 14964376752.

The previous prime is 28058206747. The next prime is 28058206823. The reversal of 28058206815 is 51860285082.

28058206815 is a `hidden beast` number, since 2 + 8 + 0 + 582 + 0 + 68 + 1 + 5 = 666.

It is not a de Polignac number, because 28058206815 - 2⁹ = 28058206303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34639357 + ... + 34640166.

Almost surely, 2^28058206815 is an apocalyptic number.

28058206815 is a deficient number, since it is larger than the sum of its proper divisors (22238727609).

28058206815 is an equidigital number, since it uses as much as digits as its factorization.

28058206815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69279540 (or 69279531 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 28058206815 in words is "twenty-eight billion, fifty-eight million, two hundred six thousand, eight hundred fifteen".