28226687508 has 72 divisors (see below), whose sum is σ = 77696018400. Its totient is φ = 8606316096.

The previous prime is 28226687497. The next prime is 28226687519. The reversal of 28226687508 is 80578662282.

It is an interprime number because it is at equal distance from previous prime (28226687497) and next prime (28226687519).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 691666 + ... + 731337.

Almost surely, 2^28226687508 is an apocalyptic number.

It is an amenable number.

28226687508 is an abundant number, since it is smaller than the sum of its proper divisors (49469330892).

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

28226687508 is a wasteful number, since it uses less digits than its factorization.

28226687508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423061 (or 1423056 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 28226687508 in words is "twenty-eight billion, two hundred twenty-six million, six hundred eighty-seven thousand, five hundred eight".