401443224 has 128 divisors (see below), whose sum is σ = 1240995840. Its totient is φ = 105380352.

The previous prime is 401443223. The next prime is 401443241. The reversal of 401443224 is 422344104.

It is a happy number.

It is a super-2 number, since 2×401443224² = 322313324191028352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 401443194 and 401443203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401443223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 866817 + ... + 867279.

It is an arithmetic number, because the mean of its divisors is an integer number (9695280).

Almost surely, 2^401443224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401443224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620497920).

401443224 is an abundant number, since it is smaller than the sum of its proper divisors (839552616).

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

401443224 is a wasteful number, since it uses less digits than its factorization.

401443224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 401443224 is about 20036.0481133381. The cubic root of 401443224 is about 737.6913832145.

Adding to 401443224 its reverse (422344104), we get a palindrome (823787328).

The spelling of 401443224 in words is "four hundred one million, four hundred forty-three thousand, two hundred twenty-four".