28080223440 has 80 divisors (see below), whose sum is σ = 90833436288. Its totient is φ = 7162490368.

The previous prime is 28080223439. The next prime is 28080223441. The reversal of 28080223440 is 4432208082.

It is an interprime number because it is at equal distance from previous prime (28080223439) and next prime (28080223441).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28080223441) 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, 2537979 + ... + 2549018.

Almost surely, 2^28080223440 is an apocalyptic number.

28080223440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28080223440 is an abundant number, since it is smaller than the sum of its proper divisors (62753212848).

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

28080223440 is a wasteful number, since it uses less digits than its factorization.

28080223440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5087036 (or 5087030 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The spelling of 28080223440 in words is "twenty-eight billion, eighty million, two hundred twenty-three thousand, four hundred forty".