402220206 has 12 divisors (see below), whose sum is σ = 871477152. Its totient is φ = 134073396.

The previous prime is 402220171. The next prime is 402220207. The reversal of 402220206 is 602022204.

It is a happy number.

It is a super-2 number, since 2×402220206² = 323562188229364872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 22345567 = 402220206 / (4 + 0 + 2 + 2 + 2 + 0 + 2 + 0 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402220207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11172766 + ... + 11172801.

It is an arithmetic number, because the mean of its divisors is an integer number (72623096).

Almost surely, 2^402220206 is an apocalyptic number.

402220206 is an abundant number, since it is smaller than the sum of its proper divisors (469256946).

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

402220206 is a wasteful number, since it uses less digits than its factorization.

402220206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22345575 (or 22345572 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402220206 is about 20055.4283424713. The cubic root of 402220206 is about 738.1670034289.

The spelling of 402220206 in words is "four hundred two million, two hundred twenty thousand, two hundred six".