400212434 has 8 divisors (see below), whose sum is σ = 611645580. Its totient is φ = 196330576.

The previous prime is 400212427. The next prime is 400212437. The reversal of 400212434 is 434212004.

It can be written as a sum of positive squares in 2 ways, for example, as 316946809 + 83265625 = 17803^2 + 9125^2 .

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

It is not an unprimeable number, because it can be changed into a prime (400212437) 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, 1887689 + ... + 1887900.

Almost surely, 2^400212434 is an apocalyptic number.

400212434 is a deficient number, since it is larger than the sum of its proper divisors (211433146).

400212434 is a wasteful number, since it uses less digits than its factorization.

400212434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775644.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 400212434 is about 20005.3101450590. The cubic root of 400212434 is about 736.9367122353.

Adding to 400212434 its reverse (434212004), we get a palindrome (834424438).

The spelling of 400212434 in words is "four hundred million, two hundred twelve thousand, four hundred thirty-four".