283778728 has 8 divisors (see below), whose sum is σ = 532085130. Its totient is φ = 141889360.

The previous prime is 283778723. The next prime is 283778741. The reversal of 283778728 is 827877382.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 279625284 + 4153444 = 16722^2 + 2038^2 .

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

It is not an unprimeable number, because it can be changed into a prime (283778723) by changing a digit.

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 as a sum of consecutive naturals, namely, 17736163 + ... + 17736178.

Almost surely, 2^283778728 is an apocalyptic number.

It is an amenable number.

283778728 is a deficient number, since it is larger than the sum of its proper divisors (248306402).

283778728 is a wasteful number, since it uses less digits than its factorization.

283778728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35472347 (or 35472343 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 52.

The square root of 283778728 is about 16845.7332283282. The cubic root of 283778728 is about 657.1430905211.

The spelling of 283778728 in words is "two hundred eighty-three million, seven hundred seventy-eight thousand, seven hundred twenty-eight".