28001248036778 has 16 divisors (see below), whose sum is σ = 42109558433856. Its totient is φ = 13964747890080.

The previous prime is 28001248036739. The next prime is 28001248036807. The reversal of 28001248036778 is 87763084210082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1932851 + ... + 7729062.

It is an arithmetic number, because the mean of its divisors is an integer number (2631847402116).

Almost surely, 2^{28001248036778} is an apocalyptic number.

28001248036778 is a deficient number, since it is larger than the sum of its proper divisors (14108310397078).

28001248036778 is a wasteful number, since it uses less digits than its factorization.

28001248036778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9665629.

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

The spelling of 28001248036778 in words is "twenty-eight trillion, one billion, two hundred forty-eight million, thirty-six thousand, seven hundred seventy-eight".