28281630876 has 12 divisors (see below), whose sum is σ = 65990472072. Its totient is φ = 9427210288.

The previous prime is 28281630803. The next prime is 28281630893. The reversal of 28281630876 is 67803618282.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1178401275 + ... + 1178401298.

It is an arithmetic number, because the mean of its divisors is an integer number (5499206006).

Almost surely, 2^28281630876 is an apocalyptic number.

It is an amenable number.

28281630876 is an abundant number, since it is smaller than the sum of its proper divisors (37708841196).

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

28281630876 is a wasteful number, since it uses less digits than its factorization.

28281630876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356802580 (or 2356802578 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 28281630876 in words is "twenty-eight billion, two hundred eighty-one million, six hundred thirty thousand, eight hundred seventy-six".