142489928 has 16 divisors (see below), whose sum is σ = 305335680. Its totient is φ = 61067088.

The previous prime is 142489913. The next prime is 142489931. The reversal of 142489928 is 829984241.

It is a happy 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, 1272176 + ... + 1272287.

It is an arithmetic number, because the mean of its divisors is an integer number (19083480).

Almost surely, 2^142489928 is an apocalyptic number.

It is an amenable number.

142489928 is an abundant number, since it is smaller than the sum of its proper divisors (162845752).

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

142489928 is a wasteful number, since it uses less digits than its factorization.

142489928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544476 (or 2544472 counting only the distinct ones).

The product of its digits is 331776, while the sum is 47.

The square root of 142489928 is about 11936.9145092021. The cubic root of 142489928 is about 522.3096570936.

The spelling of 142489928 in words is "one hundred forty-two million, four hundred eighty-nine thousand, nine hundred twenty-eight".