42031806 has 32 divisors (see below), whose sum is σ = 87556896. Its totient is φ = 13440000.

The previous prime is 42031799. The next prime is 42031807. The reversal of 42031806 is 60813024.

It is a happy number.

42031806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42031807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13606 + ... + 16406.

It is an arithmetic number, because the mean of its divisors is an integer number (2736153).

Almost surely, 2^42031806 is an apocalyptic number.

42031806 is an abundant number, since it is smaller than the sum of its proper divisors (45525090).

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

42031806 is a wasteful number, since it uses less digits than its factorization.

42031806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 42031806 is about 6483.1941201849. The cubic root of 42031806 is about 347.6903871927.

The spelling of 42031806 in words is "forty-two million, thirty-one thousand, eight hundred six".