28173728803968 has 256 divisors, whose sum is σ = 93838833936000. Its totient is φ = 8243096924160.

The previous prime is 28173728803967. The next prime is 28173728803973. The reversal of 28173728803968 is 86930882737182.

28173728803968 is a `hidden beast` number, since 28 + 1 + 73 + 72 + 8 + 80 + 396 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 28173728803896 and 28173728803905.

It is not an unprimeable number, because it can be changed into a prime (28173728803967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11675155 + ... + 13880082.

Almost surely, 2^{28173728803968} is an apocalyptic number.

It is an amenable number.

28173728803968 is an abundant number, since it is smaller than the sum of its proper divisors (65665105132032).

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

28173728803968 is a wasteful number, since it uses less digits than its factorization.

28173728803968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25555300 (or 25555282 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 72.

The spelling of 28173728803968 in words is "twenty-eight trillion, one hundred seventy-three billion, seven hundred twenty-eight million, eight hundred three thousand, nine hundred sixty-eight".