812167236 has 168 divisors, whose sum is σ = 2280610080. Its totient is φ = 252222336.

The previous prime is 812167229. The next prime is 812167261. The reversal of 812167236 is 632761218.

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

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 812167236.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 5928160 + ... + 5928296.

It is an arithmetic number, because the mean of its divisors is an integer number (13575060).

Almost surely, 2^812167236 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 812167236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1140305040).

812167236 is an abundant number, since it is smaller than the sum of its proper divisors (1468442844).

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

812167236 is a wasteful number, since it uses less digits than its factorization.

812167236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 268 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 812167236 is about 28498.5479630103. The cubic root of 812167236 is about 933.0003825434. Note that the first 3 decimals are identical.

It can be divided in two parts, 8121 and 67236, that added together give a palindrome (75357).

The spelling of 812167236 in words is "eight hundred twelve million, one hundred sixty-seven thousand, two hundred thirty-six".