28058530 has 16 divisors (see below), whose sum is σ = 51580800. Its totient is φ = 10984432.

The previous prime is 28058521. The next prime is 28058549. The reversal of 28058530 is 3585082.

It is a super-2 number, since 2×28058530² = 1574562211521800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28058492 and 28058501.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29380 + ... + 30319.

It is an arithmetic number, because the mean of its divisors is an integer number (3223800).

Almost surely, 2^28058530 is an apocalyptic number.

28058530 is a deficient number, since it is larger than the sum of its proper divisors (23522270).

28058530 is a wasteful number, since it uses less digits than its factorization.

28058530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59753.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 28058530 is about 5297.0303000832. The cubic root of 28058530 is about 303.8703351106.

The spelling of 28058530 in words is "twenty-eight million, fifty-eight thousand, five hundred thirty".