400000111 has 8 divisors (see below), whose sum is σ = 457264544. Its totient is φ = 342766080.

The previous prime is 400000109. The next prime is 400000151. The reversal of 400000111 is 111000004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400000111 - 2¹ = 400000109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400000094 and 400000103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400000151) 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, 43711 + ... + 52063.

It is an arithmetic number, because the mean of its divisors is an integer number (57158068).

Almost surely, 2^400000111 is an apocalyptic number.

400000111 is a deficient number, since it is larger than the sum of its proper divisors (57264433).

400000111 is an equidigital number, since it uses as much as digits as its factorization.

400000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15201.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 400000111 is about 20000.0027749998. The cubic root of 400000111 is about 736.8063678827.

Adding to 400000111 its reverse (111000004), we get a palindrome (511000115).

The spelling of 400000111 in words is "four hundred million, one hundred eleven", and thus it is an aban number.