400444742 has 8 divisors (see below), whose sum is σ = 601236432. Its totient is φ = 200032600.

The previous prime is 400444727. The next prime is 400444771. The reversal of 400444742 is 247444004.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 92234 + ... + 96477.

It is an arithmetic number, because the mean of its divisors is an integer number (75154554).

Almost surely, 2^400444742 is an apocalyptic number.

400444742 is a deficient number, since it is larger than the sum of its proper divisors (200791690).

400444742 is a wasteful number, since it uses less digits than its factorization.

400444742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189774.

The product of its (nonzero) digits is 14336, while the sum is 29.

The square root of 400444742 is about 20011.1154611631. The cubic root of 400444742 is about 737.0792725071.

Adding to 400444742 its reverse (247444004), we get a palindrome (647888746).

The spelling of 400444742 in words is "four hundred million, four hundred forty-four thousand, seven hundred forty-two".