28326249220 has 12 divisors (see below), whose sum is σ = 59485123404. Its totient is φ = 11330499680.

The previous prime is 28326249209. The next prime is 28326249227. The reversal of 28326249220 is 2294262382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4922144964 + 23404104256 = 70158^2 + 152984^2 .

It is not an unprimeable number, because it can be changed into a prime (28326249227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708156211 + ... + 708156250.

It is an arithmetic number, because the mean of its divisors is an integer number (4957093617).

Almost surely, 2^28326249220 is an apocalyptic number.

28326249220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28326249220 is an abundant number, since it is smaller than the sum of its proper divisors (31158874184).

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

28326249220 is a wasteful number, since it uses less digits than its factorization.

28326249220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416312470 (or 1416312468 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 28326249220 in words is "twenty-eight billion, three hundred twenty-six million, two hundred forty-nine thousand, two hundred twenty".