402040202 has 4 divisors (see below), whose sum is σ = 603060306. Its totient is φ = 201020100.

The previous prime is 402040201. The next prime is 402040229. The reversal of 402040202 is 202040204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 235346281 + 166693921 = 15341^2 + 12911^2 .

It is not an unprimeable number, because it can be changed into a prime (402040201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510049 + ... + 100510052.

Almost surely, 2^402040202 is an apocalyptic number.

402040202 is a deficient number, since it is larger than the sum of its proper divisors (201020104).

402040202 is a wasteful number, since it uses less digits than its factorization.

402040202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201020103.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 402040202 is about 20050.9401774580. The cubic root of 402040202 is about 738.0568706893.

Adding to 402040202 its reverse (202040204), we get a palindrome (604080406).

The spelling of 402040202 in words is "four hundred two million, forty thousand, two hundred two".