818136342 has 64 divisors (see below), whose sum is σ = 1898424000. Its totient is φ = 260838144.

The previous prime is 818136329. The next prime is 818136343. The reversal of 818136342 is 243631818.

818136342 is a `hidden beast` number, since 8 + 1 + 8 + 13 + 634 + 2 = 666.

It is a super-2 number, since 2×818136342² = 1338694148202281928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 818136297 and 818136306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818136343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168298 + ... + 173090.

It is an arithmetic number, because the mean of its divisors is an integer number (29662875).

Almost surely, 2^818136342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818136342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949212000).

818136342 is an abundant number, since it is smaller than the sum of its proper divisors (1080287658).

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

818136342 is a wasteful number, since it uses less digits than its factorization.

818136342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942 (or 4936 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 818136342 is about 28603.0827359570. The cubic root of 818136342 is about 935.2805327493.

The spelling of 818136342 in words is "eight hundred eighteen million, one hundred thirty-six thousand, three hundred forty-two".