39956545 has 8 divisors (see below), whose sum is σ = 50768424. Its totient is φ = 30084864.

The previous prime is 39956537. The next prime is 39956549. The reversal of 39956545 is 54565993.

It can be written as a sum of positive squares in 4 ways, for example, as 8248384 + 31708161 = 2872^2 + 5631^2 .

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 39956545 - 2³ = 39956537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39956495 and 39956504.

It is not an unprimeable number, because it can be changed into a prime (39956549) 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, 234954 + ... + 235123.

It is an arithmetic number, because the mean of its divisors is an integer number (6346053).

Almost surely, 2^39956545 is an apocalyptic number.

It is an amenable number.

39956545 is a deficient number, since it is larger than the sum of its proper divisors (10811879).

39956545 is a wasteful number, since it uses less digits than its factorization.

39956545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470099.

The product of its digits is 729000, while the sum is 46.

The square root of 39956545 is about 6321.1189673981. The cubic root of 39956545 is about 341.8712994529.

The spelling of 39956545 in words is "thirty-nine million, nine hundred fifty-six thousand, five hundred forty-five".