39945386 has 16 divisors (see below), whose sum is σ = 64818600. Its totient is φ = 18353088.

The previous prime is 39945349. The next prime is 39945397. The reversal of 39945386 is 68354993.

It can be written as a sum of positive squares in 4 ways, for example, as 37589161 + 2356225 = 6131^2 + 1535^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 39945386.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2600 + ... + 9308.

Almost surely, 2^39945386 is an apocalyptic number.

39945386 is a deficient number, since it is larger than the sum of its proper divisors (24873214).

39945386 is a wasteful number, since it uses less digits than its factorization.

39945386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6953.

The product of its digits is 699840, while the sum is 47.

The square root of 39945386 is about 6320.2362297623. The cubic root of 39945386 is about 341.8394707331.

The spelling of 39945386 in words is "thirty-nine million, nine hundred forty-five thousand, three hundred eighty-six".