400320004430 has 32 divisors (see below), whose sum is σ = 743951831040. Its totient is φ = 154935200160.

The previous prime is 400320004429. The next prime is 400320004457. The reversal of 400320004430 is 34400023004.

It is a happy number.

It is a super-2 number, since 2×400320004430² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1688981 + ... + 1911359.

It is an arithmetic number, because the mean of its divisors is an integer number (23248494720).

Almost surely, 2^400320004430 is an apocalyptic number.

400320004430 is a deficient number, since it is larger than the sum of its proper divisors (343631826610).

400320004430 is a wasteful number, since it uses less digits than its factorization.

400320004430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228224.

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

Adding to 400320004430 its reverse (34400023004), we get a palindrome (434720027434).

The spelling of 400320004430 in words is "four hundred billion, three hundred twenty million, four thousand, four hundred thirty".