400434212 has 6 divisors (see below), whose sum is σ = 700759878. Its totient is φ = 200217104.

The previous prime is 400434211. The next prime is 400434241. The reversal of 400434212 is 212434004.

It can be written as a sum of positive squares in only one way, i.e., 357058816 + 43375396 = 18896^2 + 6586^2 .

It is not an unprimeable number, because it can be changed into a prime (400434211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50054273 + ... + 50054280.

It is an arithmetic number, because the mean of its divisors is an integer number (116793313).

Almost surely, 2^400434212 is an apocalyptic number.

It is an amenable number.

400434212 is a deficient number, since it is larger than the sum of its proper divisors (300325666).

400434212 is a wasteful number, since it uses less digits than its factorization.

400434212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100108557 (or 100108555 counting only the distinct ones).

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

The square root of 400434212 is about 20010.8523556594. The cubic root of 400434212 is about 737.0728117632.

Adding to 400434212 its reverse (212434004), we get a palindrome (612868216).

The spelling of 400434212 in words is "four hundred million, four hundred thirty-four thousand, two hundred twelve".