28058237 has 4 divisors (see below), whose sum is σ = 28279296. Its totient is φ = 27837180.

The previous prime is 28058221. The next prime is 28058249. The reversal of 28058237 is 73285082.

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 28058237 - 2⁴ = 28058221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28058197 and 28058206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28058257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110339 + ... + 110592.

It is an arithmetic number, because the mean of its divisors is an integer number (7069824).

Almost surely, 2^28058237 is an apocalyptic number.

It is an amenable number.

28058237 is a deficient number, since it is larger than the sum of its proper divisors (221059).

28058237 is a wasteful number, since it uses less digits than its factorization.

28058237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221058.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 28058237 is about 5297.0026430048. The cubic root of 28058237 is about 303.8692773892.

The spelling of 28058237 in words is "twenty-eight million, fifty-eight thousand, two hundred thirty-seven".