28058221071 has 60 divisors (see below), whose sum is σ = 42942075264. Its totient is φ = 18257054400.

The previous prime is 28058221043. The next prime is 28058221091. The reversal of 28058221071 is 17012285082.

28058221071 is a `hidden beast` number, since 2 + 8 + 0 + 582 + 2 + 1 + 0 + 71 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-28058221071 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28058221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 53854291 + ... + 53854811.

Almost surely, 2^28058221071 is an apocalyptic number.

28058221071 is a deficient number, since it is larger than the sum of its proper divisors (14883854193).

28058221071 is an equidigital number, since it uses as much as digits as its factorization.

28058221071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 28058221071 in words is "twenty-eight billion, fifty-eight million, two hundred twenty-one thousand, seventy-one".