39860945 has 4 divisors (see below), whose sum is σ = 47833140. Its totient is φ = 31888752.

The previous prime is 39860923. The next prime is 39860959. The reversal of 39860945 is 54906893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5837056 + 34023889 = 2416^2 + 5833^2 .

It is a cyclic number.

It is not a de Polignac number, because 39860945 - 2¹⁰ = 39859921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39860896 and 39860905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3986090 + ... + 3986099.

It is an arithmetic number, because the mean of its divisors is an integer number (11958285).

Almost surely, 2^39860945 is an apocalyptic number.

It is an amenable number.

39860945 is a deficient number, since it is larger than the sum of its proper divisors (7972195).

39860945 is an equidigital number, since it uses as much as digits as its factorization.

39860945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7972194.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 39860945 is about 6313.5524865166. The cubic root of 39860945 is about 341.5984280404.

The spelling of 39860945 in words is "thirty-nine million, eight hundred sixty thousand, nine hundred forty-five".