28375475520 has 896 divisors, whose sum is σ = 114608701440. Its totient is φ = 5802762240.

The previous prime is 28375475519. The next prime is 28375475549. The reversal of 28375475520 is 2557457382.

It is a super-2 number, since 2×28375475520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28375475520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 265191307 + ... + 265191413.

Almost surely, 2^28375475520 is an apocalyptic number.

28375475520 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 28375475520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57304350720).

28375475520 is an abundant number, since it is smaller than the sum of its proper divisors (86233225920).

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

28375475520 is a wasteful number, since it uses less digits than its factorization.

28375475520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 48.

The spelling of 28375475520 in words is "twenty-eight billion, three hundred seventy-five million, four hundred seventy-five thousand, five hundred twenty".