28190481280 has 64 divisors (see below), whose sum is σ = 72576957600. Its totient is φ = 10408790016.

The previous prime is 28190481247. The next prime is 28190481281. The reversal of 28190481280 is 8218409182.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28190481281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1685820 + ... + 1702459.

Almost surely, 2^28190481280 is an apocalyptic number.

28190481280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28190481280 is an abundant number, since it is smaller than the sum of its proper divisors (44386476320).

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

28190481280 is a wasteful number, since it uses less digits than its factorization.

28190481280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388311 (or 3388299 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 43.

The spelling of 28190481280 in words is "twenty-eight billion, one hundred ninety million, four hundred eighty-one thousand, two hundred eighty".