280000801 has 4 divisors (see below), whose sum is σ = 280406704. Its totient is φ = 279594900.

The previous prime is 280000769. The next prime is 280000811. The reversal of 280000801 is 108000082.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 280000801 - 2⁵ = 280000769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280000811) 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, 201915 + ... + 203296.

It is an arithmetic number, because the mean of its divisors is an integer number (70101676).

Almost surely, 2^280000801 is an apocalyptic number.

It is an amenable number.

280000801 is a deficient number, since it is larger than the sum of its proper divisors (405903).

280000801 is an equidigital number, since it uses as much as digits as its factorization.

280000801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405902.

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

The square root of 280000801 is about 16733.2244651173. The cubic root of 280000801 is about 654.2138858762.

Adding to 280000801 its reverse (108000082), we get a palindrome (388000883).

The spelling of 280000801 in words is "two hundred eighty million, eight hundred one", and thus it is an aban number.