142320228 has 24 divisors (see below), whose sum is σ = 346519488. Its totient is φ = 45377376.

The previous prime is 142320193. The next prime is 142320247. The reversal of 142320228 is 822023241.

It is a junction number, because it is equal to n+sod(n) for n = 142320198 and 142320207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257551 + ... + 258102.

It is an arithmetic number, because the mean of its divisors is an integer number (14438312).

Almost surely, 2^142320228 is an apocalyptic number.

It is an amenable number.

142320228 is an abundant number, since it is smaller than the sum of its proper divisors (204199260).

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

142320228 is a wasteful number, since it uses less digits than its factorization.

142320228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515683 (or 515681 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 142320228 is about 11929.8041895079. The cubic root of 142320228 is about 522.1022245153.

Adding to 142320228 its reverse (822023241), we get a palindrome (964343469).

The spelling of 142320228 in words is "one hundred forty-two million, three hundred twenty thousand, two hundred twenty-eight".