42818356 has 18 divisors (see below), whose sum is σ = 87166338. Its totient is φ = 18350640.

The previous prime is 42818353. The next prime is 42818357. The reversal of 42818356 is 65381824.

It is a happy number.

42818356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 21473956 + 21344400 = 4634^2 + 4620^2 .

It is a super-2 number, since 2×42818356² = 3666823221085472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42818353) 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 5 ways as a sum of consecutive naturals, for example, 109035 + ... + 109426.

Almost surely, 2^42818356 is an apocalyptic number.

It is an amenable number.

42818356 is an abundant number, since it is smaller than the sum of its proper divisors (44347982).

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

42818356 is a wasteful number, since it uses less digits than its factorization.

42818356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218479 (or 218470 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 42818356 is about 6543.5736413675. The cubic root of 42818356 is about 349.8457987394.

The spelling of 42818356 in words is "forty-two million, eight hundred eighteen thousand, three hundred fifty-six".