810828001 has 4 divisors (see below), whose sum is σ = 818266900. Its totient is φ = 803389104.

The previous prime is 810827977. The next prime is 810828017. The reversal of 810828001 is 100828018.

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 348792976 + 462035025 = 18676^2 + 21495^2 .

It is a cyclic number.

It is not a de Polignac number, because 810828001 - 2⁷ = 810827873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (810828701) 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, 3719286 + ... + 3719503.

It is an arithmetic number, because the mean of its divisors is an integer number (204566725).

Almost surely, 2^810828001 is an apocalyptic number.

It is an amenable number.

810828001 is a deficient number, since it is larger than the sum of its proper divisors (7438899).

810828001 is a wasteful number, since it uses less digits than its factorization.

810828001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7438898.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 810828001 is about 28475.0417207772. The cubic root of 810828001 is about 932.4872722138.

The spelling of 810828001 in words is "eight hundred ten million, eight hundred twenty-eight thousand, one".