28535801 has 12 divisors (see below), whose sum is σ = 34111296. Its totient is φ = 23340240.

The previous prime is 28535737. The next prime is 28535807. The reversal of 28535801 is 10853582.

It is a happy number.

It is not a de Polignac number, because 28535801 - 2⁶ = 28535737 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 (28535807) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 67571 + ... + 67991.

It is an arithmetic number, because the mean of its divisors is an integer number (2842608).

Almost surely, 2^28535801 is an apocalyptic number.

It is an amenable number.

28535801 is a deficient number, since it is larger than the sum of its proper divisors (5575495).

28535801 is an frugal number, since it uses more digits than its factorization.

28535801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 28535801 is about 5341.8911445292. The cubic root of 28535801 is about 305.5835856943.

The spelling of 28535801 in words is "twenty-eight million, five hundred thirty-five thousand, eight hundred one".