400134423 has 16 divisors (see below), whose sum is σ = 608350176. Its totient is φ = 231751680.

The previous prime is 400134421. The next prime is 400134437. The reversal of 400134423 is 324431004.

It is not a de Polignac number, because 400134423 - 2¹ = 400134421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400134423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400134421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301098 + ... + 302423.

It is an arithmetic number, because the mean of its divisors is an integer number (38021886).

Almost surely, 2^400134423 is an apocalyptic number.

400134423 is a deficient number, since it is larger than the sum of its proper divisors (208215753).

400134423 is a wasteful number, since it uses less digits than its factorization.

400134423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603554.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 400134423 is about 20003.3602927108. The cubic root of 400134423 is about 736.8888269118. Note that the first 4 decimals are identical.

Adding to 400134423 its reverse (324431004), we get a palindrome (724565427).

The spelling of 400134423 in words is "four hundred million, one hundred thirty-four thousand, four hundred twenty-three".