402218900 has 18 divisors (see below), whose sum is σ = 872815230. Its totient is φ = 160887520.

The previous prime is 402218899. The next prime is 402218959. The reversal of 402218900 is 9812204.

402218900 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 26091664 + 376127236 = 5108^2 + 19394^2 .

It is a super-3 number, since 3×402218900³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 402218900.

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 5 ways as a sum of consecutive naturals, for example, 2010995 + ... + 2011194.

It is an arithmetic number, because the mean of its divisors is an integer number (48489735).

Almost surely, 2^402218900 is an apocalyptic number.

It is an amenable number.

402218900 is an abundant number, since it is smaller than the sum of its proper divisors (470596330).

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

402218900 is a wasteful number, since it uses less digits than its factorization.

402218900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022203 (or 4022196 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 402218900 is about 20055.3957826815. The cubic root of 402218900 is about 738.1662044908.

It can be divided in two parts, 4022 and 18900, that added together give a palindrome (22922).

The spelling of 402218900 in words is "four hundred two million, two hundred eighteen thousand, nine hundred".