28226287136 has 24 divisors (see below), whose sum is σ = 55663004124. Its totient is φ = 14089651200.

The previous prime is 28226287097. The next prime is 28226287139. The reversal of 28226287136 is 63178262282.

It can be written as a sum of positive squares in 2 ways, for example, as 26432256400 + 1794030736 = 162580^2 + 42356^2 .

It is not an unprimeable number, because it can be changed into a prime (28226287139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714605 + ... + 753068.

Almost surely, 2^28226287136 is an apocalyptic number.

It is an amenable number.

28226287136 is a deficient number, since it is larger than the sum of its proper divisors (27436716988).

28226287136 is a wasteful number, since it uses less digits than its factorization.

28226287136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468284 (or 1468276 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The spelling of 28226287136 in words is "twenty-eight billion, two hundred twenty-six million, two hundred eighty-seven thousand, one hundred thirty-six".