28058669 has 4 divisors (see below), whose sum is σ = 28244640. Its totient is φ = 27872700.

The previous prime is 28058647. The next prime is 28058699. The reversal of 28058669 is 96685082.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28058669 - 2²⁴ = 11281453 is a prime.

It is a super-2 number, since 2×28058669² = 1574577812103122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28058609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92759 + ... + 93060.

It is an arithmetic number, because the mean of its divisors is an integer number (7061160).

Almost surely, 2^28058669 is an apocalyptic number.

It is an amenable number.

28058669 is a deficient number, since it is larger than the sum of its proper divisors (185971).

28058669 is a wasteful number, since it uses less digits than its factorization.

28058669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185970.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 28058669 is about 5297.0434206263. The cubic root of 28058669 is about 303.8708368939.

The spelling of 28058669 in words is "twenty-eight million, fifty-eight thousand, six hundred sixty-nine".