39891105 has 12 divisors (see below), whose sum is σ = 69144660. Its totient is φ = 21275232.

The previous prime is 39891097. The next prime is 39891107. The reversal of 39891105 is 50119893.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22924944 + 16966161 = 4788^2 + 4119^2 .

It is not a de Polignac number, because 39891105 - 2³ = 39891097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39891105.

It is not an unprimeable number, because it can be changed into a prime (39891107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 443190 + ... + 443279.

It is an arithmetic number, because the mean of its divisors is an integer number (5762055).

Almost surely, 2^39891105 is an apocalyptic number.

It is an amenable number.

39891105 is a deficient number, since it is larger than the sum of its proper divisors (29253555).

39891105 is a wasteful number, since it uses less digits than its factorization.

39891105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886480 (or 886477 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 39891105 is about 6315.9405475353. The cubic root of 39891105 is about 341.6845608977.

The spelling of 39891105 in words is "thirty-nine million, eight hundred ninety-one thousand, one hundred five".