400223142 has 96 divisors (see below), whose sum is σ = 1000097280. Its totient is φ = 114528960.

The previous prime is 400223141. The next prime is 400223149. The reversal of 400223142 is 241322004.

400223142 is a `hidden beast` number, since 400 + 223 + 1 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400223141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 269133 + ... + 270615.

It is an arithmetic number, because the mean of its divisors is an integer number (10417680).

Almost surely, 2^400223142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400223142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500048640).

400223142 is an abundant number, since it is smaller than the sum of its proper divisors (599874138).

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

400223142 is a wasteful number, since it uses less digits than its factorization.

400223142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1575 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 400223142 is about 20005.5777722114. The cubic root of 400223142 is about 736.9432846181.

Adding to 400223142 its reverse (241322004), we get a palindrome (641545146).

The spelling of 400223142 in words is "four hundred million, two hundred twenty-three thousand, one hundred forty-two".