28580530 has 16 divisors (see below), whose sum is σ = 56121984. Its totient is φ = 10392880.

The previous prime is 28580507. The next prime is 28580533. The reversal of 28580530 is 3508582.

It is a junction number, because it is equal to n+sod(n) for n = 28580492 and 28580501.

It is not an unprimeable number, because it can be changed into a prime (28580533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129802 + ... + 130021.

It is an arithmetic number, because the mean of its divisors is an integer number (3507624).

Almost surely, 2^28580530 is an apocalyptic number.

28580530 is a deficient number, since it is larger than the sum of its proper divisors (27541454).

28580530 is a wasteful number, since it uses less digits than its factorization.

28580530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259841.

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

The square root of 28580530 is about 5346.0761311452. The cubic root of 28580530 is about 305.7431666687.

The spelling of 28580530 in words is "twenty-eight million, five hundred eighty thousand, five hundred thirty".