28520435 has 4 divisors (see below), whose sum is σ = 34224528. Its totient is φ = 22816344.

The previous prime is 28520419. The next prime is 28520447. The reversal of 28520435 is 53402582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28520435 - 2⁴ = 28520419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28520398 and 28520407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2852039 + ... + 2852048.

It is an arithmetic number, because the mean of its divisors is an integer number (8556132).

Almost surely, 2^28520435 is an apocalyptic number.

28520435 is a deficient number, since it is larger than the sum of its proper divisors (5704093).

28520435 is an equidigital number, since it uses as much as digits as its factorization.

28520435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5704092.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 28520435 is about 5340.4526961672. The cubic root of 28520435 is about 305.5287254801.

The spelling of 28520435 in words is "twenty-eight million, five hundred twenty thousand, four hundred thirty-five".