812366785 has 24 divisors (see below), whose sum is σ = 1023629544. Its totient is φ = 618858240.

The previous prime is 812366747. The next prime is 812366809. The reversal of 812366785 is 587663218.

It can be written as a sum of positive squares in 4 ways, for example, as 372374209 + 439992576 = 19297^2 + 20976^2 .

It is not a de Polignac number, because 812366785 - 2⁹ = 812366273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 742699 + ... + 743791.

It is an arithmetic number, because the mean of its divisors is an integer number (42651231).

Almost surely, 2^812366785 is an apocalyptic number.

It is an amenable number.

812366785 is a deficient number, since it is larger than the sum of its proper divisors (211262759).

812366785 is a wasteful number, since it uses less digits than its factorization.

812366785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1402 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 812366785 is about 28502.0487860083. The cubic root of 812366785 is about 933.0767888299.

The spelling of 812366785 in words is "eight hundred twelve million, three hundred sixty-six thousand, seven hundred eighty-five".