400403011 has 16 divisors (see below), whose sum is σ = 422504064. Its totient is φ = 378998784.

The previous prime is 400402999. The next prime is 400403027. The reversal of 400403011 is 110304004.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400403011 is a prime.

It is a super-2 number, since 2×400403011² = 320645142435732242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400402982 and 400403000.

It is not an unprimeable number, because it can be changed into a prime (400403051) 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, 335031 + ... + 336223.

It is an arithmetic number, because the mean of its divisors is an integer number (26406504).

Almost surely, 2^400403011 is an apocalyptic number.

400403011 is a deficient number, since it is larger than the sum of its proper divisors (22101053).

400403011 is a wasteful number, since it uses less digits than its factorization.

400403011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 400403011 is about 20010.0727384985. The cubic root of 400403011 is about 737.0536675398.

Adding to 400403011 its reverse (110304004), we get a palindrome (510707015).

The spelling of 400403011 in words is "four hundred million, four hundred three thousand, eleven".