400224432 has 20 divisors (see below), whose sum is σ = 1033913240. Its totient is φ = 133408128.

The previous prime is 400224431. The next prime is 400224439. The reversal of 400224432 is 234422004.

It is a junction number, because it is equal to n+sod(n) for n = 400224399 and 400224408.

It is not an unprimeable number, because it can be changed into a prime (400224431) 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, 4168957 + ... + 4169052.

It is an arithmetic number, because the mean of its divisors is an integer number (51695662).

Almost surely, 2^400224432 is an apocalyptic number.

It is an amenable number.

400224432 is an abundant number, since it is smaller than the sum of its proper divisors (633688808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400224432 is a wasteful number, since it uses less digits than its factorization.

400224432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8338020 (or 8338014 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 400224432 is about 20005.6100131938. The cubic root of 400224432 is about 736.9440763896.

Adding to 400224432 its reverse (234422004), we get a palindrome (634646436).

The spelling of 400224432 in words is "four hundred million, two hundred twenty-four thousand, four hundred thirty-two".