28530061 has 4 divisors (see below), whose sum is σ = 32605792. Its totient is φ = 24454332.

The previous prime is 28530043. The next prime is 28530119. The reversal of 28530061 is 16003582.

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 not a de Polignac number, because 28530061 - 2⁹ = 28529549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28530031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2037855 + ... + 2037868.

It is an arithmetic number, because the mean of its divisors is an integer number (8151448).

Almost surely, 2^28530061 is an apocalyptic number.

It is an amenable number.

28530061 is a deficient number, since it is larger than the sum of its proper divisors (4075731).

28530061 is an equidigital number, since it uses as much as digits as its factorization.

28530061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075730.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 28530061 is about 5341.3538545953. The cubic root of 28530061 is about 305.5630948565.

The spelling of 28530061 in words is "twenty-eight million, five hundred thirty thousand, sixty-one".