812543760 has 240 divisors, whose sum is σ = 3135585024. Its totient is φ = 184716288.

The previous prime is 812543749. The next prime is 812543761. The reversal of 812543760 is 67345218.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (812543761) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1325214 + ... + 1325826.

Almost surely, 2^812543760 is an apocalyptic number.

812543760 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 812543760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1567792512).

812543760 is an abundant number, since it is smaller than the sum of its proper divisors (2323041264).

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

812543760 is a wasteful number, since it uses less digits than its factorization.

812543760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 812543760 is about 28505.1532183218. The cubic root of 812543760 is about 933.1445411793.

Adding to 812543760 its reverse (67345218), we get a palindrome (879888978).

The spelling of 812543760 in words is "eight hundred twelve million, five hundred forty-three thousand, seven hundred sixty".