812720304 has 240 divisors, whose sum is σ = 2660496384. Its totient is φ = 237945600.

The previous prime is 812720299. The next prime is 812720357. The reversal of 812720304 is 403027218.

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 47 ways as a sum of consecutive naturals, for example, 1325502 + ... + 1326114.

Almost surely, 2^812720304 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 812720304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330248192).

812720304 is an abundant number, since it is smaller than the sum of its proper divisors (1847776080).

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

812720304 is a wasteful number, since it uses less digits than its factorization.

812720304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 660 counting only the distinct ones).

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

The square root of 812720304 is about 28508.2497533609. The cubic root of 812720304 is about 933.2121187253.

The spelling of 812720304 in words is "eight hundred twelve million, seven hundred twenty thousand, three hundred four".