28378663084 has 6 divisors (see below), whose sum is σ = 49662660404. Its totient is φ = 14189331540.

The previous prime is 28378663073. The next prime is 28378663109. The reversal of 28378663084 is 48036687382.

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 as a sum of consecutive naturals, namely, 3547332882 + ... + 3547332889.

Almost surely, 2^28378663084 is an apocalyptic number.

It is an amenable number.

28378663084 is a deficient number, since it is larger than the sum of its proper divisors (21283997320).

28378663084 is a wasteful number, since it uses less digits than its factorization.

28378663084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7094665775 (or 7094665773 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 28378663084 in words is "twenty-eight billion, three hundred seventy-eight million, six hundred sixty-three thousand, eighty-four".