400000311224 has 32 divisors (see below), whose sum is σ = 794719771200. Its totient is φ = 188092861440.

The previous prime is 400000311209. The next prime is 400000311229. The reversal of 400000311224 is 422113000004.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400000311229) 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, 933584 + ... + 1292895.

It is an arithmetic number, because the mean of its divisors is an integer number (24834992850).

Almost surely, 2^400000311224 is an apocalyptic number.

It is an amenable number.

400000311224 is a deficient number, since it is larger than the sum of its proper divisors (394719459976).

400000311224 is a wasteful number, since it uses less digits than its factorization.

400000311224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227823 (or 2227819 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 400000311224 its reverse (422113000004), we get a palindrome (822113311228).

The spelling of 400000311224 in words is "four hundred billion, three hundred eleven thousand, two hundred twenty-four".