40368539 has 4 divisors (see below), whose sum is σ = 40422624. Its totient is φ = 40314456.

The previous prime is 40368533. The next prime is 40368553. The reversal of 40368539 is 93586304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40368539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40368533) 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, 25907 + ... + 27420.

It is an arithmetic number, because the mean of its divisors is an integer number (10105656).

Almost surely, 2^40368539 is an apocalyptic number.

40368539 is a deficient number, since it is larger than the sum of its proper divisors (54085).

40368539 is an equidigital number, since it uses as much as digits as its factorization.

40368539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54084.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 40368539 is about 6353.6240839382. The cubic root of 40368539 is about 343.0423014181.

The spelling of 40368539 in words is "forty million, three hundred sixty-eight thousand, five hundred thirty-nine".