402201220 has 24 divisors (see below), whose sum is σ = 846053208. Its totient is φ = 160608000.

The previous prime is 402201209. The next prime is 402201221. The reversal of 402201220 is 22102204.

It can be written as a sum of positive squares in 4 ways, for example, as 95531076 + 306670144 = 9774^2 + 17512^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 402201220.

It is not an unprimeable number, because it can be changed into a prime (402201221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4711 + ... + 28750.

It is an arithmetic number, because the mean of its divisors is an integer number (35252217).

Almost surely, 2^402201220 is an apocalyptic number.

It is an amenable number.

402201220 is an abundant number, since it is smaller than the sum of its proper divisors (443851988).

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

402201220 is a wasteful number, since it uses less digits than its factorization.

402201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34071 (or 34069 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 402201220 is about 20054.9549987029. The cubic root of 402201220 is about 738.1553886807.

Adding to 402201220 its reverse (22102204), we get a palindrome (424303424).

The spelling of 402201220 in words is "four hundred two million, two hundred one thousand, two hundred twenty".