28578052583520 has 384 divisors, whose sum is σ = 98750337573888. Its totient is φ = 6889616179200.

The previous prime is 28578052583519. The next prime is 28578052583653. The reversal of 28578052583520 is 2538525087582.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 711000544 + ... + 711040736.

It is an arithmetic number, because the mean of its divisors is an integer number (257162337432).

Almost surely, 2^{28578052583520} is an apocalyptic number.

28578052583520 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 28578052583520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49375168786944).

28578052583520 is an abundant number, since it is smaller than the sum of its proper divisors (70172284990368).

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

28578052583520 is a wasteful number, since it uses less digits than its factorization.

28578052583520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40966 (or 40958 counting only the distinct ones).

The product of its (nonzero) digits is 53760000, while the sum is 60.

The spelling of 28578052583520 in words is "twenty-eight trillion, five hundred seventy-eight billion, fifty-two million, five hundred eighty-three thousand, five hundred twenty".