28222105064 has 8 divisors (see below), whose sum is σ = 52916447010. Its totient is φ = 14111052528.

The previous prime is 28222105063. The next prime is 28222105091. The reversal of 28222105064 is 46050122282.

It can be written as a sum of positive squares in only one way, i.e., 25998982564 + 2223122500 = 161242^2 + 47150^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28222105064.

It is not an unprimeable number, because it can be changed into a prime (28222105061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1763881559 + ... + 1763881574.

Almost surely, 2^28222105064 is an apocalyptic number.

It is an amenable number.

28222105064 is a deficient number, since it is larger than the sum of its proper divisors (24694341946).

28222105064 is a wasteful number, since it uses less digits than its factorization.

28222105064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3527763139 (or 3527763135 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 28222105064 in words is "twenty-eight billion, two hundred twenty-two million, one hundred five thousand, sixty-four".