402220020 has 48 divisors (see below), whose sum is σ = 1127887488. Its totient is φ = 107099520.

The previous prime is 402219977. The next prime is 402220033. The reversal of 402220020 is 20022204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 402219978 and 402220005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39010 + ... + 48230.

It is an arithmetic number, because the mean of its divisors is an integer number (23497656).

Almost surely, 2^402220020 is an apocalyptic number.

It is an amenable number.

402220020 is an abundant number, since it is smaller than the sum of its proper divisors (725667468).

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

402220020 is a wasteful number, since it uses less digits than its factorization.

402220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9960 (or 9958 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 402220020 is about 20055.4237053222. The cubic root of 402220020 is about 738.1668896445.

Adding to 402220020 its reverse (20022204), we get a palindrome (422242224).

It can be divided in two parts, 4022 and 20020, that added together give a palindrome (24042).

The spelling of 402220020 in words is "four hundred two million, two hundred twenty thousand, twenty".