400000011 has 8 divisors (see below), whose sum is σ = 534742080. Its totient is φ = 265962312.

The previous prime is 400000009. The next prime is 400000043. The reversal of 400000011 is 110000004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400000011 - 2¹ = 400000009 is a prime.

400000011 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 (400000091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174765 + ... + 177038.

It is an arithmetic number, because the mean of its divisors is an integer number (66842760).

Almost surely, 2^400000011 is an apocalyptic number.

400000011 is a deficient number, since it is larger than the sum of its proper divisors (134742069).

400000011 is a wasteful number, since it uses less digits than its factorization.

400000011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352185.

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

The square root of 400000011 is about 20000.0002750000. Note that the first 3 decimals coincide. The cubic root of 400000011 is about 736.8063064821.

Adding to 400000011 its reverse (110000004), we get a palindrome (510000015).

The spelling of 400000011 in words is "four hundred million, eleven", and thus it is an aban number.