812625912 has 128 divisors (see below), whose sum is σ = 2599257600. Its totient is φ = 230425344.

The previous prime is 812625899. The next prime is 812625917. The reversal of 812625912 is 219526218.

812625912 is a `hidden beast` number, since 8 + 1 + 2 + 62 + 591 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812625917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205183 + ... + 209105.

It is an arithmetic number, because the mean of its divisors is an integer number (20306700).

Almost surely, 2^812625912 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 812625912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1299628800).

812625912 is an abundant number, since it is smaller than the sum of its proper divisors (1786631688).

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

812625912 is a wasteful number, since it uses less digits than its factorization.

812625912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4082 (or 4072 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 812625912 is about 28506.5941845040. The cubic root of 812625912 is about 933.1759885551.

The spelling of 812625912 in words is "eight hundred twelve million, six hundred twenty-five thousand, nine hundred twelve".