28078783328 has 24 divisors (see below), whose sum is σ = 55307030688. Its totient is φ = 14032553344.

The previous prime is 28078783297. The next prime is 28078783333. The reversal of 28078783328 is 82338787082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146651 + ... + 278682.

It is an arithmetic number, because the mean of its divisors is an integer number (2304459612).

Almost surely, 2^28078783328 is an apocalyptic number.

It is an amenable number.

28078783328 is a deficient number, since it is larger than the sum of its proper divisors (27228247360).

28078783328 is a wasteful number, since it uses less digits than its factorization.

28078783328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427406 (or 427398 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 56.

The spelling of 28078783328 in words is "twenty-eight billion, seventy-eight million, seven hundred eighty-three thousand, three hundred twenty-eight".