28211040890 has 8 divisors (see below), whose sum is σ = 50779873620. Its totient is φ = 11284416352.

The previous prime is 28211040883. The next prime is 28211040947. The reversal of 28211040890 is 9804011282.

It can be written as a sum of positive squares in 2 ways, for example, as 26366939641 + 1844101249 = 162379^2 + 42943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28211040890.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1410552035 + ... + 1410552054.

Almost surely, 2^28211040890 is an apocalyptic number.

28211040890 is a deficient number, since it is larger than the sum of its proper divisors (22568832730).

28211040890 is a wasteful number, since it uses less digits than its factorization.

28211040890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821104096.

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 28211040890 in words is "twenty-eight billion, two hundred eleven million, forty thousand, eight hundred ninety".