402222210 has 256 divisors, whose sum is σ = 1207664640. Its totient is φ = 84602880.

The previous prime is 402222169. The next prime is 402222217. The reversal of 402222210 is 12222204.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 402222210.

It is not an unprimeable number, because it can be changed into a prime (402222217) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3905019 + ... + 3905121.

It is an arithmetic number, because the mean of its divisors is an integer number (4717440).

Almost surely, 2^402222210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402222210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603832320).

402222210 is an abundant number, since it is smaller than the sum of its proper divisors (805442430).

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

402222210 is a wasteful number, since it uses less digits than its factorization.

402222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 402222210 is about 20055.4783039448. The cubic root of 402222210 is about 738.1682293612.

Adding to 402222210 its reverse (12222204), we get a palindrome (414444414).

The spelling of 402222210 in words is "four hundred two million, two hundred twenty-two thousand, two hundred ten".