810028566 has 32 divisors (see below), whose sum is σ = 1801279200. Its totient is φ = 269827200.

The previous prime is 810028519. The next prime is 810028567. The reversal of 810028566 is 665820018.

It is a happy number.

It is a super-2 number, since 2×810028566² = 1312292555472032712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 810028566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810028567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93090 + ... + 101418.

It is an arithmetic number, because the mean of its divisors is an integer number (56289975).

Almost surely, 2^810028566 is an apocalyptic number.

810028566 is an abundant number, since it is smaller than the sum of its proper divisors (991250634).

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

810028566 is a wasteful number, since it uses less digits than its factorization.

810028566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10141 (or 10135 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 810028566 is about 28461.0007905555. Note that the first 3 decimals coincide. The cubic root of 810028566 is about 932.1807098306.

The spelling of 810028566 in words is "eight hundred ten million, twenty-eight thousand, five hundred sixty-six".