28081470080 has 128 divisors (see below), whose sum is σ = 68442408000. Its totient is φ = 11014365184.

The previous prime is 28081470047. The next prime is 28081470083. The reversal of 28081470080 is 8007418082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (28081470083) 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, 21484787 + ... + 21486093.

Almost surely, 2^28081470080 is an apocalyptic number.

28081470080 is a gapful number since it is divisible by the number (20) 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 28081470080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34221204000).

28081470080 is an abundant number, since it is smaller than the sum of its proper divisors (40360937920).

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

28081470080 is a wasteful number, since it uses less digits than its factorization.

28081470080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954 (or 1942 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The spelling of 28081470080 in words is "twenty-eight billion, eighty-one million, four hundred seventy thousand, eighty".