400404240442 has 8 divisors (see below), whose sum is σ = 603961704000. Its totient is φ = 199083672444.

The previous prime is 400404240427. The next prime is 400404240469. The reversal of 400404240442 is 244042404004.

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

It is a self number, because there is not a number n which added to its sum of digits gives 400404240442.

It is an unprimeable number.

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, 559223442 + ... + 559224157.

It is an arithmetic number, because the mean of its divisors is an integer number (75495213000).

Almost surely, 2^400404240442 is an apocalyptic number.

400404240442 is a deficient number, since it is larger than the sum of its proper divisors (203557463558).

400404240442 is a wasteful number, since it uses less digits than its factorization.

400404240442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118447780.

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 400404240442 its reverse (244042404004), we get a palindrome (644446644446).

The spelling of 400404240442 in words is "four hundred billion, four hundred four million, two hundred forty thousand, four hundred forty-two".