400544006 has 8 divisors (see below), whose sum is σ = 615470184. Its totient is φ = 195387280.

The previous prime is 400543991. The next prime is 400544017. The reversal of 400544006 is 600445004.

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, 2442260 + ... + 2442423.

It is an arithmetic number, because the mean of its divisors is an integer number (76933773).

Almost surely, 2^400544006 is an apocalyptic number.

400544006 is a deficient number, since it is larger than the sum of its proper divisors (214926178).

400544006 is a wasteful number, since it uses less digits than its factorization.

400544006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4884726.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400544006 is about 20013.5955290398. The cubic root of 400544006 is about 737.1401709571.

The spelling of 400544006 in words is "four hundred million, five hundred forty-four thousand, six".