28656906184 has 8 divisors (see below), whose sum is σ = 53731699110. Its totient is φ = 14328453088.

The previous prime is 28656906181. The next prime is 28656906193. The reversal of 28656906184 is 48160965682.

It can be written as a sum of positive squares in only one way, i.e., 22717121284 + 5939784900 = 150722^2 + 77070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (28656906181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1791056629 + ... + 1791056644.

Almost surely, 2^28656906184 is an apocalyptic number.

It is an amenable number.

28656906184 is a deficient number, since it is larger than the sum of its proper divisors (25074792926).

28656906184 is a wasteful number, since it uses less digits than its factorization.

28656906184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3582113279 (or 3582113275 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 28656906184 in words is "twenty-eight billion, six hundred fifty-six million, nine hundred six thousand, one hundred eighty-four".