810022140 has 48 divisors (see below), whose sum is σ = 2520070560. Its totient is φ = 216005760.

The previous prime is 810022139. The next prime is 810022153. The reversal of 810022140 is 41220018.

It is a super-2 number, since 2×810022140² = 1312271734580359200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

810022140 is a modest number, since divided by 22140 gives 8100 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 749481 + ... + 750560.

It is an arithmetic number, because the mean of its divisors is an integer number (52501470).

Almost surely, 2^810022140 is an apocalyptic number.

It is an amenable number.

810022140 is an abundant number, since it is smaller than the sum of its proper divisors (1710048420).

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

810022140 is a wasteful number, since it uses less digits than its factorization.

810022140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500059 (or 1500051 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 810022140 is about 28460.8878990098. The cubic root of 810022140 is about 932.1782448110.

Adding to 810022140 its reverse (41220018), we get a palindrome (851242158).

The spelling of 810022140 in words is "eight hundred ten million, twenty-two thousand, one hundred forty".