402220170 has 96 divisors (see below), whose sum is σ = 1208001600. Its totient is φ = 91768320.

The previous prime is 402220157. The next prime is 402220171. The reversal of 402220170 is 71022204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (402220171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4881 + ... + 28779.

It is an arithmetic number, because the mean of its divisors is an integer number (12583350).

Almost surely, 2^402220170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402220170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604000800).

402220170 is an abundant number, since it is smaller than the sum of its proper divisors (805781430).

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

402220170 is a wasteful number, since it uses less digits than its factorization.

402220170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23940 (or 23937 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 402220170 is about 20055.4274449586. The cubic root of 402220170 is about 738.1669814061.

Adding to 402220170 its reverse (71022204), we get a palindrome (473242374).

The spelling of 402220170 in words is "four hundred two million, two hundred twenty thousand, one hundred seventy".