401442020 has 48 divisors (see below), whose sum is σ = 965841408. Its totient is φ = 137297280.

The previous prime is 401442011. The next prime is 401442049. The reversal of 401442020 is 20244104.

It is a super-2 number, since 2×401442020² = 322311390843360800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401442020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57014 + ... + 63666.

It is an arithmetic number, because the mean of its divisors is an integer number (20121696).

Almost surely, 2^401442020 is an apocalyptic number.

It is an amenable number.

401442020 is an abundant number, since it is smaller than the sum of its proper divisors (564399388).

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

401442020 is a wasteful number, since it uses less digits than its factorization.

401442020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7100 (or 7098 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 401442020 is about 20036.0180674704. The cubic root of 401442020 is about 737.6906457243.

Adding to 401442020 its reverse (20244104), we get a palindrome (421686124).

The spelling of 401442020 in words is "four hundred one million, four hundred forty-two thousand, twenty".