28534801 has 4 divisors (see below), whose sum is σ = 28619812. Its totient is φ = 28449792.

The previous prime is 28534799. The next prime is 28534853. The reversal of 28534801 is 10843582.

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 17305600 + 11229201 = 4160^2 + 3351^2 .

It is a 4-Lehmer number, since φ(28534801) divides (28534801-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 28534801 - 2¹ = 28534799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28534861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42000 + ... + 42673.

It is an arithmetic number, because the mean of its divisors is an integer number (7154953).

Almost surely, 2^28534801 is an apocalyptic number.

It is an amenable number.

28534801 is a deficient number, since it is larger than the sum of its proper divisors (85011).

28534801 is an equidigital number, since it uses as much as digits as its factorization.

28534801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85010.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28534801 is about 5341.7975438985. The cubic root of 28534801 is about 305.5800160596.

The spelling of 28534801 in words is "twenty-eight million, five hundred thirty-four thousand, eight hundred one".