400424402 has 16 divisors (see below), whose sum is σ = 710112960. Its totient is φ = 165692688.

The previous prime is 400424393. The next prime is 400424407. The reversal of 400424402 is 204424004.

It is not an unprimeable number, because it can be changed into a prime (400424407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492728 + ... + 493539.

It is an arithmetic number, because the mean of its divisors is an integer number (44382060).

Almost surely, 2^400424402 is an apocalyptic number.

400424402 is a deficient number, since it is larger than the sum of its proper divisors (309688558).

400424402 is a wasteful number, since it uses less digits than its factorization.

400424402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986305.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 400424402 is about 20010.6072371630. The cubic root of 400424402 is about 737.0667926777.

Adding to 400424402 its reverse (204424004), we get a palindrome (604848406).

It can be divided in two parts, 40042 and 4402, that added together give a palindrome (44444).

The spelling of 400424402 in words is "four hundred million, four hundred twenty-four thousand, four hundred two".