40011 has 4 divisors (see below), whose sum is σ = 53352. Its totient is φ = 26672.

The previous prime is 40009. The next prime is 40013. The reversal of 40011 is 11004.

40011 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (40009) and next prime (40013).

It is a cyclic number.

It is not a de Polignac number, because 40011 - 2¹ = 40009 is a prime.

It is a D-number.

40011 is a modest number, since divided by 11 gives 4 as remainder.

It is not an unprimeable number, because it can be changed into a prime (40013) 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, 6666 + ... + 6671.

It is an arithmetic number, because the mean of its divisors is an integer number (13338).

2⁴⁰⁰¹¹ is an apocalyptic number.

40011 is a deficient number, since it is larger than the sum of its proper divisors (13341).

40011 is a wasteful number, since it uses less digits than its factorization.

40011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13340.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 40011 is about 200.0274981096. The cubic root of 40011 is about 34.2026536021.

Adding to 40011 its reverse (11004), we get a palindrome (51015).

The spelling of 40011 in words is "forty thousand, eleven", and thus it is an iban number.