400042230 has 32 divisors (see below), whose sum is σ = 1097259264. Its totient is φ = 91438176.

The previous prime is 400042217. The next prime is 400042231. The reversal of 400042230 is 32240004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400042231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 952272 + ... + 952691.

It is an arithmetic number, because the mean of its divisors is an integer number (34289352).

Almost surely, 2^400042230 is an apocalyptic number.

400042230 is an abundant number, since it is smaller than the sum of its proper divisors (697217034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400042230 is a wasteful number, since it uses less digits than its factorization.

400042230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904980.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 400042230 is about 20001.0557221363. The cubic root of 400042230 is about 736.8322282573.

Adding to 400042230 its reverse (32240004), we get a palindrome (432282234).

The spelling of 400042230 in words is "four hundred million, forty-two thousand, two hundred thirty".