42540036 has 72 divisors (see below), whose sum is σ = 125981856. Its totient is φ = 11047680.

The previous prime is 42540019. The next prime is 42540037. The reversal of 42540036 is 63004524.

It is a junction number, because it is equal to n+sod(n) for n = 42539988 and 42540015.

It is not an unprimeable number, because it can be changed into a prime (42540037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3180 + ... + 9756.

It is an arithmetic number, because the mean of its divisors is an integer number (1749748).

Almost surely, 2^42540036 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 42540036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62990928).

42540036 is an abundant number, since it is smaller than the sum of its proper divisors (83441820).

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

42540036 is a wasteful number, since it uses less digits than its factorization.

42540036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6609 (or 6600 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 42540036 is about 6522.2723034231. The cubic root of 42540036 is about 349.0861493442.

The spelling of 42540036 in words is "forty-two million, five hundred forty thousand, thirty-six".