39081040 has 20 divisors (see below), whose sum is σ = 90863604. Its totient is φ = 15632384.

The previous prime is 39081019. The next prime is 39081047. The reversal of 39081040 is 4018093.

It can be written as a sum of positive squares in 2 ways, for example, as 28815424 + 10265616 = 5368^2 + 3204^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 39080996 and 39081014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39081047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244177 + ... + 244336.

Almost surely, 2^39081040 is an apocalyptic number.

It is an amenable number.

39081040 is an abundant number, since it is smaller than the sum of its proper divisors (51782564).

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

39081040 is a wasteful number, since it uses less digits than its factorization.

39081040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488526 (or 488520 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 39081040 is about 6251.4830240512. The cubic root of 39081040 is about 339.3558739067.

The spelling of 39081040 in words is "thirty-nine million, eighty-one thousand, forty".