402004204220 has 48 divisors (see below), whose sum is σ = 861278745600. Its totient is φ = 157567801920.

The previous prime is 402004204213. The next prime is 402004204223. The reversal of 402004204220 is 22402400204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 402004204192 and 402004204201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402004204223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180740 + ... + 914699.

It is an arithmetic number, because the mean of its divisors is an integer number (17943307200).

Almost surely, 2^402004204220 is an apocalyptic number.

It is an amenable number.

402004204220 is an abundant number, since it is smaller than the sum of its proper divisors (459274541380).

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

402004204220 is a wasteful number, since it uses less digits than its factorization.

402004204220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095818 (or 1095816 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 402004204220 its reverse (22402400204), we get a palindrome (424406604424).

The spelling of 402004204220 in words is "four hundred two billion, four million, two hundred four thousand, two hundred twenty".