400424303 has 8 divisors (see below), whose sum is σ = 413867520. Its totient is φ = 387014040.

The previous prime is 400424293. The next prime is 400424317. The reversal of 400424303 is 303424004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400424303 - 2²⁰ = 399375727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400424363) 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 7 ways as a sum of consecutive naturals, for example, 17828 + ... + 33446.

It is an arithmetic number, because the mean of its divisors is an integer number (51733440).

Almost surely, 2^400424303 is an apocalyptic number.

400424303 is a deficient number, since it is larger than the sum of its proper divisors (13443217).

400424303 is a wasteful number, since it uses less digits than its factorization.

400424303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16477.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 400424303 is about 20010.6047634748. The cubic root of 400424303 is about 737.0667319341.

Adding to 400424303 its reverse (303424004), we get a palindrome (703848307).

The spelling of 400424303 in words is "four hundred million, four hundred twenty-four thousand, three hundred three".