400042214 has 48 divisors (see below), whose sum is σ = 717912720. Its totient is φ = 166056000.

The previous prime is 400042213. The next prime is 400042217. The reversal of 400042214 is 412240004.

It is a junction number, because it is equal to n+sod(n) for n = 400042192 and 400042201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400042213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 317117 + ... + 318375.

It is an arithmetic number, because the mean of its divisors is an integer number (14956515).

Almost surely, 2^400042214 is an apocalyptic number.

400042214 is a deficient number, since it is larger than the sum of its proper divisors (317870506).

400042214 is a wasteful number, since it uses less digits than its factorization.

400042214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397 (or 1386 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 400042214 is about 20001.0553221574. The cubic root of 400042214 is about 736.8322184339.

Adding to 400042214 its reverse (412240004), we get a palindrome (812282218).

The spelling of 400042214 in words is "four hundred million, forty-two thousand, two hundred fourteen".