400434243 has 8 divisors (see below), whose sum is σ = 582449856. Its totient is φ = 242687400.

The previous prime is 400434241. The next prime is 400434259. The reversal of 400434243 is 342434004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400434243 - 2¹ = 400434241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400434241) 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, 6067153 + ... + 6067218.

It is an arithmetic number, because the mean of its divisors is an integer number (72806232).

Almost surely, 2^400434243 is an apocalyptic number.

400434243 is a deficient number, since it is larger than the sum of its proper divisors (182015613).

400434243 is a wasteful number, since it uses less digits than its factorization.

400434243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12134385.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 400434243 is about 20010.8531302391. The cubic root of 400434243 is about 737.0728307836.

Adding to 400434243 its reverse (342434004), we get a palindrome (742868247).

The spelling of 400434243 in words is "four hundred million, four hundred thirty-four thousand, two hundred forty-three".