400224464 has 20 divisors (see below), whose sum is σ = 775833156. Its totient is φ = 200009472.

The previous prime is 400224463. The next prime is 400224467. The reversal of 400224464 is 464422004.

It can be written as a sum of positive squares in 2 ways, for example, as 201640000 + 198584464 = 14200^2 + 14092^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400224463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33062 + ... + 43514.

Almost surely, 2^400224464 is an apocalyptic number.

It is an amenable number.

400224464 is a deficient number, since it is larger than the sum of its proper divisors (375608692).

400224464 is a wasteful number, since it uses less digits than its factorization.

400224464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12854 (or 12848 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 400224464 is about 20005.6108129694. The cubic root of 400224464 is about 736.9440960304.

Adding to 400224464 its reverse (464422004), we get a palindrome (864646468).

The spelling of 400224464 in words is "four hundred million, two hundred twenty-four thousand, four hundred sixty-four".