812280791 has 24 divisors (see below), whose sum is σ = 1007014896. Its totient is φ = 651006720.

The previous prime is 812280779. The next prime is 812280797. The reversal of 812280791 is 197082218.

It is not a de Polignac number, because 812280791 - 2²⁶ = 745171927 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812280797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127676 + ... + 133886.

It is an arithmetic number, because the mean of its divisors is an integer number (41958954).

Almost surely, 2^812280791 is an apocalyptic number.

812280791 is a deficient number, since it is larger than the sum of its proper divisors (194734105).

812280791 is a wasteful number, since it uses less digits than its factorization.

812280791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6399 (or 6392 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 812280791 is about 28500.5401878631. The cubic root of 812280791 is about 933.0438637036.

The spelling of 812280791 in words is "eight hundred twelve million, two hundred eighty thousand, seven hundred ninety-one".