142770728 has 16 divisors (see below), whose sum is σ = 268375380. Its totient is φ = 71203968.

The previous prime is 142770703. The next prime is 142770739. The reversal of 142770728 is 827077241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 114019684 + 28751044 = 10678^2 + 5362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142770691 and 142770700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19301 + ... + 25652.

Almost surely, 2^142770728 is an apocalyptic number.

It is an amenable number.

142770728 is a deficient number, since it is larger than the sum of its proper divisors (125604652).

142770728 is a wasteful number, since it uses less digits than its factorization.

142770728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45356 (or 45352 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 142770728 is about 11948.6705536641. The cubic root of 142770728 is about 522.6525311873.

The spelling of 142770728 in words is "one hundred forty-two million, seven hundred seventy thousand, seven hundred twenty-eight".