142224728 has 16 divisors (see below), whose sum is σ = 280707000. Its totient is φ = 67369536.

The previous prime is 142224713. The next prime is 142224739. The reversal of 142224728 is 827422241.

It is a junction number, because it is equal to n+sod(n) for n = 142224694 and 142224703.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 467693 + ... + 467996.

Almost surely, 2^142224728 is an apocalyptic number.

It is an amenable number.

142224728 is a deficient number, since it is larger than the sum of its proper divisors (138482272).

142224728 is a wasteful number, since it uses less digits than its factorization.

142224728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935714 (or 935710 counting only the distinct ones).

The product of its digits is 14336, while the sum is 32.

The square root of 142224728 is about 11925.8009374633. The cubic root of 142224728 is about 521.9854176967.

Adding to 142224728 its reverse (827422241), we get a palindrome (969646969).

The spelling of 142224728 in words is "one hundred forty-two million, two hundred twenty-four thousand, seven hundred twenty-eight".