28251270208 has 112 divisors (see below), whose sum is σ = 70788605184. Its totient is φ = 10899947520.

The previous prime is 28251270193. The next prime is 28251270209. The reversal of 28251270208 is 80207215282.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (28251270209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94528 + ... + 255808.

Almost surely, 2^28251270208 is an apocalyptic number.

28251270208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28251270208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35394302592).

28251270208 is an abundant number, since it is smaller than the sum of its proper divisors (42537334976).

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

28251270208 is a wasteful number, since it uses less digits than its factorization.

28251270208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161340 (or 161330 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 28251270208 in words is "twenty-eight billion, two hundred fifty-one million, two hundred seventy thousand, two hundred eight".