402240004442 has 8 divisors (see below), whose sum is σ = 603363624276. Its totient is φ = 201118796352.

The previous prime is 402240004423. The next prime is 402240004447. The reversal of 402240004442 is 244400042204.

It can be written as a sum of positive squares in 2 ways, for example, as 395539108561 + 6700895881 = 628919^2 + 81859^2 .

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 (402240004447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103103 + ... + 902834.

Almost surely, 2^402240004442 is an apocalyptic number.

402240004442 is a deficient number, since it is larger than the sum of its proper divisors (201123619834).

402240004442 is a wasteful number, since it uses less digits than its factorization.

402240004442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205872.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 402240004442 its reverse (244400042204), we get a palindrome (646640046646).

The spelling of 402240004442 in words is "four hundred two billion, two hundred forty million, four thousand, four hundred forty-two".