42206538 has 16 divisors (see below), whose sum is σ = 92087136. Its totient is φ = 12789840.

The previous prime is 42206533. The next prime is 42206551. The reversal of 42206538 is 83560224.

It is not an unprimeable number, because it can be changed into a prime (42206533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319681 + ... + 319812.

It is an arithmetic number, because the mean of its divisors is an integer number (5755446).

Almost surely, 2^42206538 is an apocalyptic number.

42206538 is an abundant number, since it is smaller than the sum of its proper divisors (49880598).

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

42206538 is a wasteful number, since it uses less digits than its factorization.

42206538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639509.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 42206538 is about 6496.6559090043. The cubic root of 42206538 is about 348.1715200197.

The spelling of 42206538 in words is "forty-two million, two hundred six thousand, five hundred thirty-eight".