402210 has 48 divisors (see below), whose sum is σ = 1081080. Its totient is φ = 103680.

The previous prime is 402197. The next prime is 402221. The reversal of 402210 is 12204.

It can be written as a sum of positive squares in 4 ways, for example, as 257049 + 145161 = 507^2 + 381^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 402192 and 402201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3636 + ... + 3744.

2⁴⁰²²¹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (540540).

402210 is an abundant number, since it is smaller than the sum of its proper divisors (678870).

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

402210 is a wasteful number, since it uses less digits than its factorization.

402210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 402210 is about 634.2002838221. The cubic root of 402210 is about 73.8160759920.

Adding to 402210 its reverse (12204), we get a palindrome (414414).

The spelling of 402210 in words is "four hundred two thousand, two hundred ten", and thus it is an iban number.