812340720 has 60 divisors (see below), whose sum is σ = 2728113336. Its totient is φ = 216624000.

The previous prime is 812340719. The next prime is 812340731. The reversal of 812340720 is 27043218.

812340720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

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, 563406 + ... + 564845.

Almost surely, 2^812340720 is an apocalyptic number.

812340720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

812340720 is an abundant number, since it is smaller than the sum of its proper divisors (1915772616).

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

812340720 is a wasteful number, since it uses less digits than its factorization.

812340720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128270 (or 1128261 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 812340720 is about 28501.5915345091. The cubic root of 812340720 is about 933.0668093858.

Adding to 812340720 its reverse (27043218), we get a palindrome (839383938).

The spelling of 812340720 in words is "eight hundred twelve million, three hundred forty thousand, seven hundred twenty".