812404218 has 8 divisors (see below), whose sum is σ = 1624808448. Its totient is φ = 270801404.

The previous prime is 812404207. The next prime is 812404237.

812404218 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

812404218 is an admirable number.

It is a super-2 number, since 2×812404218² = 1320001226848383048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67700346 + ... + 67700357.

It is an arithmetic number, because the mean of its divisors is an integer number (203101056).

Almost surely, 2^812404218 is an apocalyptic number.

812404218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

812404218 is a wasteful number, since it uses less digits than its factorization.

812404218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135400708.

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 812404218 is about 28502.7054505357. The cubic root of 812404218 is about 933.0911203394.

It can be divided in two parts, 81240 and 4218, that added together give a palindrome (85458).

The spelling of 812404218 in words is "eight hundred twelve million, four hundred four thousand, two hundred eighteen".