40013705 has 4 divisors (see below), whose sum is σ = 48016452. Its totient is φ = 32010960.

The previous prime is 40013681. The next prime is 40013711. The reversal of 40013705 is 50731004.

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 8620096 + 31393609 = 2936^2 + 5603^2 .

It is not a de Polignac number, because 40013705 - 2¹⁰ = 40012681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4001366 + ... + 4001375.

It is an arithmetic number, because the mean of its divisors is an integer number (12004113).

Almost surely, 2^40013705 is an apocalyptic number.

It is an amenable number.

40013705 is a deficient number, since it is larger than the sum of its proper divisors (8002747).

40013705 is an equidigital number, since it uses as much as digits as its factorization.

40013705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002746.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 40013705 is about 6325.6387029295. The cubic root of 40013705 is about 342.0342435759.

Adding to 40013705 its reverse (50731004), we get a palindrome (90744709).

The spelling of 40013705 in words is "forty million, thirteen thousand, seven hundred five".