401210020 has 24 divisors (see below), whose sum is σ = 848127168. Its totient is φ = 159420000.

The previous prime is 401209961. The next prime is 401210027. The reversal of 401210020 is 20012104.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 401209979 and 401210006.

It is not an unprimeable number, because it can be changed into a prime (401210027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63406 + ... + 69445.

It is an arithmetic number, because the mean of its divisors is an integer number (35338632).

Almost surely, 2^401210020 is an apocalyptic number.

It is an amenable number.

401210020 is an abundant number, since it is smaller than the sum of its proper divisors (446917148).

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

401210020 is a wasteful number, since it uses less digits than its factorization.

401210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133011 (or 133009 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 401210020 is about 20030.2276572185. The cubic root of 401210020 is about 737.5485104546.

Adding to 401210020 its reverse (20012104), we get a palindrome (421222124).

The spelling of 401210020 in words is "four hundred one million, two hundred ten thousand, twenty".