39388945 has 8 divisors (see below), whose sum is σ = 47568744. Its totient is φ = 31309824.

The previous prime is 39388891. The next prime is 39388963. The reversal of 39388945 is 54988393.

It can be written as a sum of positive squares in 4 ways, for example, as 12680721 + 26708224 = 3561^2 + 5168^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39388945 - 2²³ = 31000337 is a prime.

It is a super-3 number, since 3×39388945³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

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, 24304 + ... + 25873.

It is an arithmetic number, because the mean of its divisors is an integer number (5946093).

Almost surely, 2^39388945 is an apocalyptic number.

It is an amenable number.

39388945 is a deficient number, since it is larger than the sum of its proper divisors (8179799).

39388945 is a wasteful number, since it uses less digits than its factorization.

39388945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50339.

The product of its digits is 933120, while the sum is 49.

The square root of 39388945 is about 6276.0612648380. The cubic root of 39388945 is about 340.2447632011.

The spelling of 39388945 in words is "thirty-nine million, three hundred eighty-eight thousand, nine hundred forty-five".