42040306 has 16 divisors (see below), whose sum is σ = 78621120. Its totient is φ = 16379280.

The previous prime is 42040301. The next prime is 42040321. The reversal of 42040306 is 60304024.

It is not an unprimeable number, because it can be changed into a prime (42040301) 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, 136341 + ... + 136648.

It is an arithmetic number, because the mean of its divisors is an integer number (4913820).

Almost surely, 2^42040306 is an apocalyptic number.

42040306 is a deficient number, since it is larger than the sum of its proper divisors (36580814).

42040306 is a wasteful number, since it uses less digits than its factorization.

42040306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273009.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 42040306 is about 6483.8496281145. The cubic root of 42040306 is about 347.7138231679.

The spelling of 42040306 in words is "forty-two million, forty thousand, three hundred six".