28248687650 has 12 divisors (see below), whose sum is σ = 52542559122. Its totient is φ = 11299475040.

The previous prime is 28248687641. The next prime is 28248687661. The reversal of 28248687650 is 5678684282.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 18391970689 + 9856716961 = 135617^2 + 99281^2 .

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 282486827 + ... + 282486926.

Almost surely, 2^28248687650 is an apocalyptic number.

28248687650 is a deficient number, since it is larger than the sum of its proper divisors (24293871472).

28248687650 is a wasteful number, since it uses less digits than its factorization.

28248687650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564973765 (or 564973760 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 56.

The spelling of 28248687650 in words is "twenty-eight billion, two hundred forty-eight million, six hundred eighty-seven thousand, six hundred fifty".