40806529 has 4 divisors (see below), whose sum is σ = 40873284. Its totient is φ = 40739776.

The previous prime is 40806517. The next prime is 40806553. The reversal of 40806529 is 92560804.

It is a happy number.

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 15000129 + 25806400 = 3873^2 + 5080^2 .

It is a cyclic number.

It is not a de Polignac number, because 40806529 - 2¹³ = 40798337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40806494 and 40806503.

It is not an unprimeable number, because it can be changed into a prime (40806559) by changing a digit.

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, 32452 + ... + 33685.

It is an arithmetic number, because the mean of its divisors is an integer number (10218321).

Almost surely, 2^40806529 is an apocalyptic number.

It is an amenable number.

40806529 is a deficient number, since it is larger than the sum of its proper divisors (66755).

40806529 is an equidigital number, since it uses as much as digits as its factorization.

40806529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66754.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 40806529 is about 6387.9988259235. The cubic root of 40806529 is about 344.2784865184.

It can be divided in two parts, 4080 and 6529, that added together give a square (10609 = 103²).

The spelling of 40806529 in words is "forty million, eight hundred six thousand, five hundred twenty-nine".