39409442 has 18 divisors (see below), whose sum is σ = 62117937. Its totient is φ = 18750336.

The previous prime is 39409441. The next prime is 39409499. The reversal of 39409442 is 24490493.

It can be written as a sum of positive squares in 2 ways, for example, as 36590401 + 2819041 = 6049^2 + 1679^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=4439.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39409441) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 204098 + ... + 204290.

Almost surely, 2^39409442 is an apocalyptic number.

39409442 is a deficient number, since it is larger than the sum of its proper divisors (22708495).

39409442 is an equidigital number, since it uses as much as digits as its factorization.

39409442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 39409442 is about 6277.6940033742. The cubic root of 39409442 is about 340.3037711923.

The spelling of 39409442 in words is "thirty-nine million, four hundred nine thousand, four hundred forty-two".