400424430 has 64 divisors (see below), whose sum is σ = 1156124160. Its totient is φ = 86707584.

The previous prime is 400424407. The next prime is 400424441. The reversal of 400424430 is 34424004.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 400424397 and 400424406.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 46189 + ... + 54168.

It is an arithmetic number, because the mean of its divisors is an integer number (18064440).

Almost surely, 2^400424430 is an apocalyptic number.

400424430 is an abundant number, since it is smaller than the sum of its proper divisors (755699730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400424430 is a wasteful number, since it uses less digits than its factorization.

400424430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100393.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 400424430 is about 20010.6079367919. The cubic root of 400424430 is about 737.0668098577.

Adding to 400424430 its reverse (34424004), we get a palindrome (434848434).

The spelling of 400424430 in words is "four hundred million, four hundred twenty-four thousand, four hundred thirty".