400243011 has 16 divisors (see below), whose sum is σ = 624079104. Its totient is φ = 223390944.

The previous prime is 400243001. The next prime is 400243027. The reversal of 400243011 is 110342004.

It is not a de Polignac number, because 400243011 - 2⁵ = 400242979 is a prime.

It is a super-2 number, since 2×400243011² = 320388935708692242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400243001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220716 + ... + 222521.

It is an arithmetic number, because the mean of its divisors is an integer number (39004944).

Almost surely, 2^400243011 is an apocalyptic number.

400243011 is a deficient number, since it is larger than the sum of its proper divisors (223836093).

400243011 is a wasteful number, since it uses less digits than its factorization.

400243011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443290.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 400243011 is about 20006.0743525560. The cubic root of 400243011 is about 736.9554795516.

Adding to 400243011 its reverse (110342004), we get a palindrome (510585015).

The spelling of 400243011 in words is "four hundred million, two hundred forty-three thousand, eleven".