28832168978 has 6 divisors (see below), whose sum is σ = 43248613671. Its totient is φ = 14415964422.

The previous prime is 28832168957. The next prime is 28832168993. The reversal of 28832168978 is 87986123882.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14416084489 + 14416084489 = 120067^2 + 120067^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=120067.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28832168978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 180101 + ... + 300167.

Almost surely, 2^28832168978 is an apocalyptic number.

28832168978 is a deficient number, since it is larger than the sum of its proper divisors (14416444693).

28832168978 is an frugal number, since it uses more digits than its factorization.

28832168978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240136 (or 120069 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 62.

The spelling of 28832168978 in words is "twenty-eight billion, eight hundred thirty-two million, one hundred sixty-eight thousand, nine hundred seventy-eight".