42347636 has 12 divisors (see below), whose sum is σ = 75507012. Its totient is φ = 20774208.

The previous prime is 42347621. The next prime is 42347639. The reversal of 42347636 is 63674324.

It can be written as a sum of positive squares in 2 ways, for example, as 29702500 + 12645136 = 5450^2 + 3556^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42347596 and 42347605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42347639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99665 + ... + 100088.

It is an arithmetic number, because the mean of its divisors is an integer number (6292251).

Almost surely, 2^42347636 is an apocalyptic number.

It is an amenable number.

42347636 is a deficient number, since it is larger than the sum of its proper divisors (33159376).

42347636 is a wasteful number, since it uses less digits than its factorization.

42347636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199810 (or 199808 counting only the distinct ones).

The product of its digits is 72576, while the sum is 35.

The square root of 42347636 is about 6507.5061275423. The cubic root of 42347636 is about 348.5590718480.

The spelling of 42347636 in words is "forty-two million, three hundred forty-seven thousand, six hundred thirty-six".