28054978560 has 680 divisors, whose sum is σ = 115711575936. Its totient is φ = 6370099200.

The previous prime is 28054978559. The next prime is 28054978577. The reversal of 28054978560 is 6587945082.

28054978560 is a `hidden beast` number, since 2 + 8 + 0 + 5 + 4 + 9 + 78 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 28054978497 and 28054978506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 185794485 + ... + 185794635.

Almost surely, 2^28054978560 is an apocalyptic number.

28054978560 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 28054978560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57855787968).

28054978560 is an abundant number, since it is smaller than the sum of its proper divisors (87656597376).

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

28054978560 is an frugal number, since it uses more digits than its factorization.

28054978560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 28054978560 in words is "twenty-eight billion, fifty-four million, nine hundred seventy-eight thousand, five hundred sixty".