142389448 has 24 divisors (see below), whose sum is σ = 275885190. Its totient is φ = 68894400.

The previous prime is 142389421. The next prime is 142389451. The reversal of 142389448 is 844983241.

142389448 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 76422564 + 65966884 = 8742^2 + 8122^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1573 + ... + 16948.

Almost surely, 2^142389448 is an apocalyptic number.

It is an amenable number.

142389448 is a deficient number, since it is larger than the sum of its proper divisors (133495742).

142389448 is a wasteful number, since it uses less digits than its factorization.

142389448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18589 (or 18554 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 142389448 is about 11932.7049741456. The cubic root of 142389448 is about 522.1868553954.

The spelling of 142389448 in words is "one hundred forty-two million, three hundred eighty-nine thousand, four hundred forty-eight".