28578252660480 has 1440 divisors, whose sum is σ = 109134702673920. Its totient is φ = 7127782686720.

The previous prime is 28578252660469. The next prime is 28578252660481. The reversal of 28578252660480 is 8406625287582.

It is a happy number.

28578252660480 is a `hidden beast` number, since 2 + 8 + 5 + 7 + 8 + 2 + 526 + 60 + 48 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28578252660481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 19859799601 + ... + 19859801039.

It is an arithmetic number, because the mean of its divisors is an integer number (75787987968).

Almost surely, 2^{28578252660480} is an apocalyptic number.

28578252660480 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 28578252660480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54567351336960).

28578252660480 is an abundant number, since it is smaller than the sum of its proper divisors (80556450013440).

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

28578252660480 is a wasteful number, since it uses less digits than its factorization.

28578252660480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707 (or 1684 counting only the distinct ones).

The product of its (nonzero) digits is 103219200, while the sum is 63.

The spelling of 28578252660480 in words is "twenty-eight trillion, five hundred seventy-eight billion, two hundred fifty-two million, six hundred sixty thousand, four hundred eighty".