28178546368 has 28 divisors (see below), whose sum is σ = 63904918672. Its totient is φ = 12076519680.

The previous prime is 28178546351. The next prime is 28178546387. The reversal of 28178546368 is 86364587182.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

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, 31448823 + ... + 31449718.

It is an arithmetic number, because the mean of its divisors is an integer number (2282318524).

Almost surely, 2^28178546368 is an apocalyptic number.

28178546368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28178546368 is an abundant number, since it is smaller than the sum of its proper divisors (35726372304).

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

28178546368 is an equidigital number, since it uses as much as digits as its factorization.

28178546368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62898560 (or 62898550 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 58.

The spelling of 28178546368 in words is "twenty-eight billion, one hundred seventy-eight million, five hundred forty-six thousand, three hundred sixty-eight".