812877912 has 192 divisors, whose sum is σ = 2889619200. Its totient is φ = 199998720.

The previous prime is 812877911. The next prime is 812877913. The reversal of 812877912 is 219778218.

It is an interprime number because it is at equal distance from previous prime (812877911) and next prime (812877913).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812877911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101478 + ... + 109194.

It is an arithmetic number, because the mean of its divisors is an integer number (15050100).

Almost surely, 2^812877912 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 812877912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444809600).

812877912 is an abundant number, since it is smaller than the sum of its proper divisors (2076741288).

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

812877912 is a wasteful number, since it uses less digits than its factorization.

812877912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7766 (or 7759 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 812877912 is about 28511.0138718356. The cubic root of 812877912 is about 933.2724396780.

The spelling of 812877912 in words is "eight hundred twelve million, eight hundred seventy-seven thousand, nine hundred twelve".