812248305 has 16 divisors (see below), whose sum is σ = 1417742784. Its totient is φ = 393817280.

The previous prime is 812248301. The next prime is 812248331. The reversal of 812248305 is 503842218.

It is not a de Polignac number, because 812248305 - 2² = 812248301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (812248301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2461194 + ... + 2461523.

It is an arithmetic number, because the mean of its divisors is an integer number (88608924).

Almost surely, 2^812248305 is an apocalyptic number.

It is an amenable number.

812248305 is a deficient number, since it is larger than the sum of its proper divisors (605494479).

812248305 is a wasteful number, since it uses less digits than its factorization.

812248305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4922736.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 812248305 is about 28499.9702631424. The cubic root of 812248305 is about 933.0314249561.

The spelling of 812248305 in words is "eight hundred twelve million, two hundred forty-eight thousand, three hundred five".