28511183680 has 224 divisors, whose sum is σ = 79401521664. Its totient is φ = 9549840384.

The previous prime is 28511183641. The next prime is 28511183707. The reversal of 28511183680 is 8638111582.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18476989 + ... + 18478531.

Almost surely, 2^28511183680 is an apocalyptic number.

28511183680 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 28511183680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39700760832).

28511183680 is an abundant number, since it is smaller than the sum of its proper divisors (50890337984).

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

28511183680 is a wasteful number, since it uses less digits than its factorization.

28511183680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753 (or 1743 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 28511183680 in words is "twenty-eight billion, five hundred eleven million, one hundred eighty-three thousand, six hundred eighty".