40826729 has 4 divisors (see below), whose sum is σ = 40847940. Its totient is φ = 40805520.

The previous prime is 40826701. The next prime is 40826749. The reversal of 40826729 is 92762804.

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 39980329 + 846400 = 6323^2 + 920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40826729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40826692 and 40826701.

It is not an unprimeable number, because it can be changed into a prime (40826749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7394 + ... + 11675.

It is an arithmetic number, because the mean of its divisors is an integer number (10211985).

Almost surely, 2^40826729 is an apocalyptic number.

It is an amenable number.

40826729 is a deficient number, since it is larger than the sum of its proper divisors (21211).

40826729 is a wasteful number, since it uses less digits than its factorization.

40826729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21210.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 40826729 is about 6389.5797201381. The cubic root of 40826729 is about 344.3352852578.

The spelling of 40826729 in words is "forty million, eight hundred twenty-six thousand, seven hundred twenty-nine".