39989545 has 8 divisors (see below), whose sum is σ = 48023496. Its totient is φ = 31967616.

The previous prime is 39989539. The next prime is 39989549. The reversal of 39989545 is 54598993.

It can be written as a sum of positive squares in 4 ways, for example, as 13816089 + 26173456 = 3717^2 + 5116^2 .

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 39989545 - 2¹³ = 39981353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39989492 and 39989501.

It is not an unprimeable number, because it can be changed into a prime (39989549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7959 + ... + 11971.

It is an arithmetic number, because the mean of its divisors is an integer number (6002937).

Almost surely, 2^39989545 is an apocalyptic number.

It is an amenable number.

39989545 is a deficient number, since it is larger than the sum of its proper divisors (8033951).

39989545 is a wasteful number, since it uses less digits than its factorization.

39989545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6011.

The product of its digits is 1749600, while the sum is 52.

The square root of 39989545 is about 6323.7287259970. The cubic root of 39989545 is about 341.9653904081.

The spelling of 39989545 in words is "thirty-nine million, nine hundred eighty-nine thousand, five hundred forty-five".