400423311 has 16 divisors (see below), whose sum is σ = 612357120. Its totient is φ = 258337080.

The previous prime is 400423301. The next prime is 400423313. The reversal of 400423311 is 113324004.

It is not a de Polignac number, because 400423311 - 2²³ = 392034703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400423313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238365 + ... + 240038.

It is an arithmetic number, because the mean of its divisors is an integer number (38272320).

Almost surely, 2^400423311 is an apocalyptic number.

400423311 is a deficient number, since it is larger than the sum of its proper divisors (211933809).

400423311 is a wasteful number, since it uses less digits than its factorization.

400423311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478443 (or 478437 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 400423311 is about 20010.5799766024. The cubic root of 400423311 is about 737.0661232708.

Adding to 400423311 its reverse (113324004), we get a palindrome (513747315).

The spelling of 400423311 in words is "four hundred million, four hundred twenty-three thousand, three hundred eleven".