28000508868378 has 64 divisors (see below), whose sum is σ = 63792618595200. Its totient is φ = 9098946380160.

The previous prime is 28000508868313. The next prime is 28000508868379. The reversal of 28000508868378 is 87386880500082.

28000508868378 is a `hidden beast` number, since 2 + 80 + 0 + 0 + 50 + 88 + 68 + 378 = 666.

It is a super-2 number, since 2×28000508868378² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28000508868379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10362973 + ... + 12782496.

It is an arithmetic number, because the mean of its divisors is an integer number (996759665550).

Almost surely, 2^{28000508868378} is an apocalyptic number.

28000508868378 is an abundant number, since it is smaller than the sum of its proper divisors (35792109726822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28000508868378 is a wasteful number, since it uses less digits than its factorization.

28000508868378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23146044 (or 23146038 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 63.

The spelling of 28000508868378 in words is "twenty-eight trillion, five hundred eight million, eight hundred sixty-eight thousand, three hundred seventy-eight".