40726013 has 4 divisors (see below), whose sum is σ = 40750428. Its totient is φ = 40701600.

The previous prime is 40726009. The next prime is 40726051. The reversal of 40726013 is 31062704.

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 10936249 + 29789764 = 3307^2 + 5458^2 .

It is a cyclic number.

It is not a de Polignac number, because 40726013 - 2² = 40726009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40726013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40726003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9506 + ... + 13107.

It is an arithmetic number, because the mean of its divisors is an integer number (10187607).

Almost surely, 2^40726013 is an apocalyptic number.

It is an amenable number.

40726013 is a deficient number, since it is larger than the sum of its proper divisors (24415).

40726013 is a wasteful number, since it uses less digits than its factorization.

40726013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24414.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 40726013 is about 6381.6935839948. The cubic root of 40726013 is about 344.0519036745.

Adding to 40726013 its reverse (31062704), we get a palindrome (71788717).

The spelling of 40726013 in words is "forty million, seven hundred twenty-six thousand, thirteen".