28798454880 has 576 divisors, whose sum is σ = 110676803328. Its totient is φ = 7029504000.

The previous prime is 28798454833. The next prime is 28798454921. The reversal of 28798454880 is 8845489782.

28798454880 is a `hidden beast` number, since 2 + 8 + 7 + 9 + 8 + 4 + 548 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 114734755 + ... + 114735005.

It is an arithmetic number, because the mean of its divisors is an integer number (192147228).

Almost surely, 2^28798454880 is an apocalyptic number.

28798454880 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 28798454880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55338401664).

28798454880 is an abundant number, since it is smaller than the sum of its proper divisors (81878348448).

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

28798454880 is a wasteful number, since it uses less digits than its factorization.

28798454880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 63.

The spelling of 28798454880 in words is "twenty-eight billion, seven hundred ninety-eight million, four hundred fifty-four thousand, eight hundred eighty".