28000801 has 4 divisors (see below), whose sum is σ = 28529172. Its totient is φ = 27472432.

The previous prime is 28000799. The next prime is 28000831. The reversal of 28000801 is 10800082.

It is a happy number.

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 12390400 + 15610401 = 3520^2 + 3951^2 .

It is a cyclic number.

It is not a de Polignac number, because 28000801 - 2¹ = 28000799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28000831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264106 + ... + 264211.

It is an arithmetic number, because the mean of its divisors is an integer number (7132293).

Almost surely, 2^28000801 is an apocalyptic number.

It is an amenable number.

28000801 is a deficient number, since it is larger than the sum of its proper divisors (528371).

28000801 is an equidigital number, since it uses as much as digits as its factorization.

28000801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528370.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 28000801 is about 5291.5783089736. The cubic root of 28000801 is about 303.6617927644.

Adding to 28000801 its reverse (10800082), we get a palindrome (38800883).

The spelling of 28000801 in words is "twenty-eight million, eight hundred one", and thus it is an aban number.