39042440 has 32 divisors (see below), whose sum is σ = 89291160. Its totient is φ = 15360000.

The previous prime is 39042389. The next prime is 39042457. The reversal of 39042440 is 4424093.

39042440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 27604516 + 11437924 = 5254^2 + 3382^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5561 + ... + 10440.

Almost surely, 2^39042440 is an apocalyptic number.

It is an amenable number.

39042440 is an abundant number, since it is smaller than the sum of its proper divisors (50248720).

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

39042440 is a wasteful number, since it uses less digits than its factorization.

39042440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16073 (or 16069 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 39042440 is about 6248.3949939164. The cubic root of 39042440 is about 339.2441108307.

The spelling of 39042440 in words is "thirty-nine million, forty-two thousand, four hundred forty".