810630720 has 224 divisors, whose sum is σ = 3028492800. Its totient is φ = 203415552.

The previous prime is 810630697. The next prime is 810630731. The reversal of 810630720 is 27036018.

810630720 is a `hidden beast` number, since 8 + 1 + 0 + 630 + 7 + 20 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144121 + ... + 149639.

Almost surely, 2^810630720 is an apocalyptic number.

810630720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 810630720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1514246400).

810630720 is an abundant number, since it is smaller than the sum of its proper divisors (2217862080).

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

810630720 is a wasteful number, since it uses less digits than its factorization.

810630720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562 (or 5546 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 810630720 is about 28471.5774062485. The cubic root of 810630720 is about 932.4116388517.

Adding to 810630720 its reverse (27036018), we get a palindrome (837666738).

The spelling of 810630720 in words is "eight hundred ten million, six hundred thirty thousand, seven hundred twenty".