812218632 has 32 divisors (see below), whose sum is σ = 2031324480. Its totient is φ = 270635840.

The previous prime is 812218621. The next prime is 812218637. The reversal of 812218632 is 236812218.

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

It is a junction number, because it is equal to n+sod(n) for n = 812218593 and 812218602.

It is not an unprimeable number, because it can be changed into a prime (812218637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82282 + ... + 91622.

It is an arithmetic number, because the mean of its divisors is an integer number (63478890).

Almost surely, 2^812218632 is an apocalyptic number.

It is an amenable number.

812218632 is an abundant number, since it is smaller than the sum of its proper divisors (1219105848).

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

812218632 is a wasteful number, since it uses less digits than its factorization.

812218632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12973 (or 12969 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 812218632 is about 28499.4496788973. The cubic root of 812218632 is about 933.0200630042.

It can be divided in two parts, 8122186 and 32, that multiplied together give a palindrome (259909952).

The spelling of 812218632 in words is "eight hundred twelve million, two hundred eighteen thousand, six hundred thirty-two".