28185182080 has 64 divisors (see below), whose sum is σ = 73505692080. Its totient is φ = 10249154560.

The previous prime is 28185182029. The next prime is 28185182087. The reversal of 28185182080 is 8028158182.

It is a happy number.

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 (28185182087) 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, 1994749 + ... + 2008828.

Almost surely, 2^28185182080 is an apocalyptic number.

28185182080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28185182080 is an abundant number, since it is smaller than the sum of its proper divisors (45320510000).

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

28185182080 is a wasteful number, since it uses less digits than its factorization.

28185182080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003607 (or 4003595 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 43.

The spelling of 28185182080 in words is "twenty-eight billion, one hundred eighty-five million, one hundred eighty-two thousand, eighty".