400430 has 16 divisors (see below), whose sum is σ = 752544. Its totient is φ = 153120.

The previous prime is 400429. The next prime is 400441. The reversal of 400430 is 34004.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400430.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641 + ... + 1100.

It is an arithmetic number, because the mean of its divisors is an integer number (47034).

2⁴⁰⁰⁴³⁰ is an apocalyptic number.

400430 is a deficient number, since it is larger than the sum of its proper divisors (352114).

400430 is a wasteful number, since it uses less digits than its factorization.

400430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 400430 is about 632.7953855710. The cubic root of 400430 is about 73.7070227434.

Adding to 400430 its reverse (34004), we get a palindrome (434434).

The spelling of 400430 in words is "four hundred thousand, four hundred thirty".