400242212 has 24 divisors (see below), whose sum is σ = 707204736. Its totient is φ = 198191168.

The previous prime is 400242197. The next prime is 400242217. The reversal of 400242212 is 212242004.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (400242217) 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, 406673 + ... + 407655.

It is an arithmetic number, because the mean of its divisors is an integer number (29466864).

Almost surely, 2^400242212 is an apocalyptic number.

It is an amenable number.

400242212 is a deficient number, since it is larger than the sum of its proper divisors (306962524).

400242212 is a wasteful number, since it uses less digits than its factorization.

400242212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867 (or 1865 counting only the distinct ones).

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

The square root of 400242212 is about 20006.0543836110. The cubic root of 400242212 is about 736.9549891597.

Adding to 400242212 its reverse (212242004), we get a palindrome (612484216).

The spelling of 400242212 in words is "four hundred million, two hundred forty-two thousand, two hundred twelve".