400134430 has 16 divisors (see below), whose sum is σ = 720705024. Its totient is φ = 159950880.

The previous prime is 400134421. The next prime is 400134437. The reversal of 400134430 is 34431004.

It is a junction number, because it is equal to n+sod(n) for n = 400134398 and 400134407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400134437) 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, 4600 + ... + 28660.

It is an arithmetic number, because the mean of its divisors is an integer number (45044064).

Almost surely, 2^400134430 is an apocalyptic number.

400134430 is a deficient number, since it is larger than the sum of its proper divisors (320570594).

400134430 is a wasteful number, since it uses less digits than its factorization.

400134430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25731.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 400134430 is about 20003.3604676814. The cubic root of 400134430 is about 736.8888312089. Note that the first 4 decimals are identical.

Adding to 400134430 its reverse (34431004), we get a palindrome (434565434).

The spelling of 400134430 in words is "four hundred million, one hundred thirty-four thousand, four hundred thirty".