28435501 has 4 divisors (see below), whose sum is σ = 28488604. Its totient is φ = 28382400.

The previous prime is 28435489. The next prime is 28435523. The reversal of 28435501 is 10553482.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18361225 + 10074276 = 4285^2 + 3174^2 .

It is a cyclic number.

It is not a de Polignac number, because 28435501 - 2¹⁷ = 28304429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28435501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28435531) 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 3 ways as a sum of consecutive naturals, for example, 25740 + ... + 26821.

It is an arithmetic number, because the mean of its divisors is an integer number (7122151).

Almost surely, 2^28435501 is an apocalyptic number.

It is an amenable number.

28435501 is a deficient number, since it is larger than the sum of its proper divisors (53103).

28435501 is an equidigital number, since it uses as much as digits as its factorization.

28435501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53102.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 28435501 is about 5332.4948195005. The cubic root of 28435501 is about 305.2251352182.

Adding to 28435501 its reverse (10553482), we get a palindrome (38988983).

The spelling of 28435501 in words is "twenty-eight million, four hundred thirty-five thousand, five hundred one".