400234423 has 6 divisors (see below), whose sum is σ = 414512384. Its totient is φ = 386432424.

The previous prime is 400234421. The next prime is 400234433. The reversal of 400234423 is 324432004.

It is not a de Polignac number, because 400234423 - 2¹ = 400234421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400234394 and 400234403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400234421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 237111 + ... + 238792.

Almost surely, 2^400234423 is an apocalyptic number.

400234423 is a deficient number, since it is larger than the sum of its proper divisors (14277961).

400234423 is an equidigital number, since it uses as much as digits as its factorization.

400234423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475961 (or 475932 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 400234423 is about 20005.8597165930. The cubic root of 400234423 is about 736.9502085715.

Adding to 400234423 its reverse (324432004), we get a palindrome (724666427).

The spelling of 400234423 in words is "four hundred million, two hundred thirty-four thousand, four hundred twenty-three".