39891106 has 16 divisors (see below), whose sum is σ = 61621560. Its totient is φ = 19353600.

The previous prime is 39891097. The next prime is 39891107. The reversal of 39891106 is 60119893.

It can be written as a sum of positive squares in 4 ways, for example, as 39879225 + 11881 = 6315^2 + 109^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

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 7 ways as a sum of consecutive naturals, for example, 51490 + ... + 52258.

Almost surely, 2^39891106 is an apocalyptic number.

39891106 is a deficient number, since it is larger than the sum of its proper divisors (21730454).

39891106 is a wasteful number, since it uses less digits than its factorization.

39891106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 39891106 is about 6315.9406267000. The cubic root of 39891106 is about 341.6845637528.

The spelling of 39891106 in words is "thirty-nine million, eight hundred ninety-one thousand, one hundred six".