39870945606 has 16 divisors (see below), whose sum is σ = 80751283200. Its totient is φ = 13122083208.

The previous prime is 39870945589. The next prime is 39870945607. The reversal of 39870945606 is 60654907893.

It is a happy number.

It is a super-2 number, since 2×39870945606² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39870945607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42057486 + ... + 42058433.

It is an arithmetic number, because the mean of its divisors is an integer number (5046955200).

Almost surely, 2^39870945606 is an apocalyptic number.

39870945606 is an abundant number, since it is smaller than the sum of its proper divisors (40880337594).

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

39870945606 is a wasteful number, since it uses less digits than its factorization.

39870945606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84116003.

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 39870945606 in words is "thirty-nine billion, eight hundred seventy million, nine hundred forty-five thousand, six hundred six".