28100134948 has 6 divisors (see below), whose sum is σ = 49175236166. Its totient is φ = 14050067472.

The previous prime is 28100134943. The next prime is 28100134967. The reversal of 28100134948 is 84943100182.

It can be written as a sum of positive squares in only one way, i.e., 14928441124 + 13171693824 = 122182^2 + 114768^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28100134948.

It is not an unprimeable number, because it can be changed into a prime (28100134943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3512516865 + ... + 3512516872.

Almost surely, 2^28100134948 is an apocalyptic number.

It is an amenable number.

28100134948 is a deficient number, since it is larger than the sum of its proper divisors (21075101218).

28100134948 is a wasteful number, since it uses less digits than its factorization.

28100134948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025033741 (or 7025033739 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 28100134948 in words is "twenty-eight billion, one hundred million, one hundred thirty-four thousand, nine hundred forty-eight".