400430432 has 12 divisors (see below), whose sum is σ = 788347476. Its totient is φ = 200215200.

The previous prime is 400430419. The next prime is 400430473. The reversal of 400430432 is 234034004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256694 + ... + 6256757.

It is an arithmetic number, because the mean of its divisors is an integer number (65695623).

Almost surely, 2^400430432 is an apocalyptic number.

It is an amenable number.

400430432 is a deficient number, since it is larger than the sum of its proper divisors (387917044).

400430432 is a wasteful number, since it uses less digits than its factorization.

400430432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12513461 (or 12513453 counting only the distinct ones).

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

The square root of 400430432 is about 20010.7579066861. The cubic root of 400430432 is about 737.0704924942.

Adding to 400430432 its reverse (234034004), we get a palindrome (634464436).

The spelling of 400430432 in words is "four hundred million, four hundred thirty thousand, four hundred thirty-two".