400242002 has 4 divisors (see below), whose sum is σ = 600363006. Its totient is φ = 200121000.

The previous prime is 400242001. The next prime is 400242013. The reversal of 400242002 is 200242004.

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., 368217721 + 32024281 = 19189^2 + 5659^2 .

It is a super-3 number, since 3×400242002³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (400242001) 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, 100060499 + ... + 100060502.

Almost surely, 2^400242002 is an apocalyptic number.

400242002 is a deficient number, since it is larger than the sum of its proper divisors (200121004).

400242002 is a wasteful number, since it uses less digits than its factorization.

400242002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200121003.

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

The square root of 400242002 is about 20006.0491351991. The cubic root of 400242002 is about 736.9548602706.

Adding to 400242002 its reverse (200242004), we get a palindrome (600484006).

The spelling of 400242002 in words is "four hundred million, two hundred forty-two thousand, two".