28058569 has 24 divisors (see below), whose sum is σ = 35639744. Its totient is φ = 21621600.

The previous prime is 28058557. The next prime is 28058579. The reversal of 28058569 is 96585082.

It is not a de Polignac number, because 28058569 - 2⁹ = 28058057 is a prime.

It is a super-2 number, since 2×28058569² = 1574566588655522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28058519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132874 + ... + 133084.

Almost surely, 2^28058569 is an apocalyptic number.

It is an amenable number.

28058569 is a deficient number, since it is larger than the sum of its proper divisors (7581175).

28058569 is a wasteful number, since it uses less digits than its factorization.

28058569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 28058569 is about 5297.0339813900. The cubic root of 28058569 is about 303.8704758989.

The spelling of 28058569 in words is "twenty-eight million, fifty-eight thousand, five hundred sixty-nine".