401443020 has 192 divisors, whose sum is σ = 1434585600. Its totient is φ = 92171520.

The previous prime is 401443019. The next prime is 401443033. The reversal of 401443020 is 20344104.

It is a super-2 number, since 2×401443020² = 322312996613440800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 401442984 and 401443002.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 111082 + ... + 114638.

It is an arithmetic number, because the mean of its divisors is an integer number (7471800).

Almost surely, 2^401443020 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 401443020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (717292800).

401443020 is an abundant number, since it is smaller than the sum of its proper divisors (1033142580).

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

401443020 is a wasteful number, since it uses less digits than its factorization.

401443020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605 (or 3597 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 401443020 is about 20036.0430225132. The cubic root of 401443020 is about 737.6912582578.

Adding to 401443020 its reverse (20344104), we get a palindrome (421787124).

The spelling of 401443020 in words is "four hundred one million, four hundred forty-three thousand, twenty".