28058505 has 32 divisors (see below), whose sum is σ = 47222784. Its totient is φ = 14198976.

The previous prime is 28058501. The next prime is 28058519. The reversal of 28058505 is 50585082.

It is not a de Polignac number, because 28058505 - 2² = 28058501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28058501) 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 31 ways as a sum of consecutive naturals, for example, 57372 + ... + 57858.

It is an arithmetic number, because the mean of its divisors is an integer number (1475712).

Almost surely, 2^28058505 is an apocalyptic number.

It is an amenable number.

28058505 is a deficient number, since it is larger than the sum of its proper divisors (19164279).

28058505 is a wasteful number, since it uses less digits than its factorization.

28058505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685.

The product of its (nonzero) digits is 16000, while the sum is 33.

The square root of 28058505 is about 5297.0279402699. The cubic root of 28058505 is about 303.8702448616.

It can be divided in two parts, 280 and 58505, that added together give a palindrome (58785).

The spelling of 28058505 in words is "twenty-eight million, fifty-eight thousand, five hundred five".