42013636 has 48 divisors (see below), whose sum is σ = 89205760. Its totient is φ = 16912800.

The previous prime is 42013619. The next prime is 42013639. The reversal of 42013636 is 63631024.

It is a self number, because there is not a number n which added to its sum of digits gives 42013636.

It is not an unprimeable number, because it can be changed into a prime (42013639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80071 + ... + 80593.

Almost surely, 2^42013636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42013636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44602880).

42013636 is an abundant number, since it is smaller than the sum of its proper divisors (47192124).

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

42013636 is a wasteful number, since it uses less digits than its factorization.

42013636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 42013636 is about 6481.7926532712. The cubic root of 42013636 is about 347.6402787510.

The spelling of 42013636 in words is "forty-two million, thirteen thousand, six hundred thirty-six".