402440242 has 8 divisors (see below), whose sum is σ = 604901376. Its totient is φ = 200806452.

The previous prime is 402440237. The next prime is 402440321. The reversal of 402440242 is 242044204.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205618 + ... + 207565.

It is an arithmetic number, because the mean of its divisors is an integer number (75612672).

Almost surely, 2^402440242 is an apocalyptic number.

402440242 is a deficient number, since it is larger than the sum of its proper divisors (202461134).

402440242 is a wasteful number, since it uses less digits than its factorization.

402440242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413672.

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 402440242 is about 20060.9132892797. The cubic root of 402440242 is about 738.3015845226.

Adding to 402440242 its reverse (242044204), we get a palindrome (644484446).

The spelling of 402440242 in words is "four hundred two million, four hundred forty thousand, two hundred forty-two".