42836818 has 4 divisors (see below), whose sum is σ = 64255230. Its totient is φ = 21418408.

The previous prime is 42836813. The next prime is 42836819. The reversal of 42836818 is 81863824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21464689 + 21372129 = 4633^2 + 4623^2 .

It is not an unprimeable number, because it can be changed into a prime (42836813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10709203 + ... + 10709206.

Almost surely, 2^42836818 is an apocalyptic number.

42836818 is a deficient number, since it is larger than the sum of its proper divisors (21418412).

42836818 is a wasteful number, since it uses less digits than its factorization.

42836818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21418411.

The product of its digits is 73728, while the sum is 40.

The square root of 42836818 is about 6544.9841863827. The cubic root of 42836818 is about 349.8960725447.

The spelling of 42836818 in words is "forty-two million, eight hundred thirty-six thousand, eight hundred eighteen".