810028100 has 36 divisors (see below), whose sum is σ = 2008871424. Its totient is φ = 277723680.

The previous prime is 810028049. The next prime is 810028111. The reversal of 810028100 is 1820018.

It is a super-2 number, since 2×810028100² = 1312291045579220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 577892 + ... + 579291.

It is an arithmetic number, because the mean of its divisors is an integer number (55801984).

Almost surely, 2^810028100 is an apocalyptic number.

It is an amenable number.

810028100 is an abundant number, since it is smaller than the sum of its proper divisors (1198843324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

810028100 is a wasteful number, since it uses less digits than its factorization.

810028100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157204 (or 1157197 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 810028100 is about 28460.9926039132. The cubic root of 810028100 is about 932.1805310730.

Adding to 810028100 its reverse (1820018), we get a palindrome (811848118).

The spelling of 810028100 in words is "eight hundred ten million, twenty-eight thousand, one hundred".