28635530 has 32 divisors (see below), whose sum is σ = 64264320. Its totient is φ = 8925120.

The previous prime is 28635517. The next prime is 28635533. The reversal of 28635530 is 3553682.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28635533) 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 15 ways as a sum of consecutive naturals, for example, 17825 + ... + 19364.

It is an arithmetic number, because the mean of its divisors is an integer number (2008260).

Almost surely, 2^28635530 is an apocalyptic number.

28635530 is an abundant number, since it is smaller than the sum of its proper divisors (35628790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28635530 is a wasteful number, since it uses less digits than its factorization.

28635530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37214.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 28635530 is about 5351.2176184491. The cubic root of 28635530 is about 305.9391637214.

The spelling of 28635530 in words is "twenty-eight million, six hundred thirty-five thousand, five hundred thirty".