40639105 has 16 divisors (see below), whose sum is σ = 52652880. Its totient is φ = 29933568.

The previous prime is 40639103. The next prime is 40639117. The reversal of 40639105 is 50193604.

It can be written as a sum of positive squares in 8 ways, for example, as 15968016 + 24671089 = 3996^2 + 4967^2 .

It is a cyclic number.

It is not a de Polignac number, because 40639105 - 2¹ = 40639103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40639103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43281 + ... + 44209.

It is an arithmetic number, because the mean of its divisors is an integer number (3290805).

Almost surely, 2^40639105 is an apocalyptic number.

It is an amenable number.

40639105 is a deficient number, since it is larger than the sum of its proper divisors (12013775).

40639105 is a wasteful number, since it uses less digits than its factorization.

40639105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 40639105 is about 6374.8807831990. The cubic root of 40639105 is about 343.8069974908.

The spelling of 40639105 in words is "forty million, six hundred thirty-nine thousand, one hundred five".