402002242 has 8 divisors (see below), whose sum is σ = 604621116. Its totient is φ = 200461872.

The previous prime is 402002221. The next prime is 402002243. The reversal of 402002242 is 242200204.

It can be written as a sum of positive squares in 2 ways, for example, as 341177841 + 60824401 = 18471^2 + 7799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (402002243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268693 + ... + 270184.

Almost surely, 2^402002242 is an apocalyptic number.

402002242 is a deficient number, since it is larger than the sum of its proper divisors (202618874).

402002242 is a wasteful number, since it uses less digits than its factorization.

402002242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539252.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 402002242 is about 20049.9935660838. The cubic root of 402002242 is about 738.0336412374.

Adding to 402002242 its reverse (242200204), we get a palindrome (644202446).

The spelling of 402002242 in words is "four hundred two million, two thousand, two hundred forty-two".