142776728 has 8 divisors (see below), whose sum is σ = 267706380. Its totient is φ = 71388360.

The previous prime is 142776721. The next prime is 142776749. The reversal of 142776728 is 827677241.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142776721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8923538 + ... + 8923553.

Almost surely, 2^142776728 is an apocalyptic number.

It is an amenable number.

142776728 is a deficient number, since it is larger than the sum of its proper divisors (124929652).

142776728 is a wasteful number, since it uses less digits than its factorization.

142776728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17847097 (or 17847093 counting only the distinct ones).

The product of its digits is 263424, while the sum is 44.

The square root of 142776728 is about 11948.9216249836. The cubic root of 142776728 is about 522.6598526490.

The spelling of 142776728 in words is "one hundred forty-two million, seven hundred seventy-six thousand, seven hundred twenty-eight".