810028620 has 96 divisors (see below), whose sum is σ = 2524213440. Its totient is φ = 215654400.

The previous prime is 810028619. The next prime is 810028669. The reversal of 810028620 is 26820018.

810028620 is a `hidden beast` number, since 8 + 10 + 0 + 28 + 620 = 666.

It is a super-2 number, since 2×810028620² = 1312292730438208800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 621970 + ... + 623270.

It is an arithmetic number, because the mean of its divisors is an integer number (26293890).

Almost surely, 2^810028620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 810028620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1262106720).

810028620 is an abundant number, since it is smaller than the sum of its proper divisors (1714184820).

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

810028620 is a wasteful number, since it uses less digits than its factorization.

810028620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472 (or 2464 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 810028620 is about 28461.0017392220. The cubic root of 810028620 is about 932.1807305450.

Adding to 810028620 its reverse (26820018), we get a palindrome (836848638).

The spelling of 810028620 in words is "eight hundred ten million, twenty-eight thousand, six hundred twenty".