400434443 has 4 divisors (see below), whose sum is σ = 421509960. Its totient is φ = 379358928.

The previous prime is 400434431. The next prime is 400434457. The reversal of 400434443 is 344434004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400434443 - 2⁶ = 400434379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400434403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10537730 + ... + 10537767.

It is an arithmetic number, because the mean of its divisors is an integer number (105377490).

Almost surely, 2^400434443 is an apocalyptic number.

400434443 is a deficient number, since it is larger than the sum of its proper divisors (21075517).

400434443 is a wasteful number, since it uses less digits than its factorization.

400434443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21075516.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 400434443 is about 20010.8581275267. The cubic root of 400434443 is about 737.0729534959.

Adding to 400434443 its reverse (344434004), we get a palindrome (744868447).

The spelling of 400434443 in words is "four hundred million, four hundred thirty-four thousand, four hundred forty-three".